Consolidated Schedule of Investments In and Advances to Affiliates (Details)

v3.24.2.u1

Consolidated Schedule of Investments In and Advances to Affiliates (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2024		Jun. 30, 2023	Jun. 30, 2024		Jun. 30, 2023	Dec. 31, 2023
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 3,414		$ (75,506)	$ (8,954)		$ (103,886)
Amount of Unrealized Gain/(Loss)		23,044		104,941	63,693		140,059
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[1]				4,286,271
Ending balance	[2]	4,737,511			4,737,511
Control investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		(361)		(48,111)	(352)		(51,077)
Amount of Unrealized Gain/(Loss)		5,589		75,779	37,659		92,940
Amount of Interest, Fees or Dividends Credited to Income					102,437		96,841
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,006,698	[1],[3]	1,703,172
Gross Additions					243,661		338,651
Gross Reductions					114,546		173,038
Ending balance		2,075,429	[2],[4]	1,883,699	2,075,429	[2],[4]	1,883,699
Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		7,863		9,997	753		(16,267)
Amount of Unrealized Gain/(Loss)		9,502		(11,469)	15,428		21,672
Amount of Interest, Fees or Dividends Credited to Income					40,928		38,455
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					615,002	[1],[5]	618,359
Gross Additions					287,347		175,201
Gross Reductions					209,969		215,521
Ending balance		752,764	[2],[6]	563,125	752,764	[2],[6]	563,125
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 GRE-LP, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					441
Gross Reductions					0
Ending balance		441			441
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 HPP-MS, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					60		67
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					315		248
Gross Additions					59		67
Gross Reductions					0		0
Ending balance		374		315	374		315
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					57		1,677
Amount of Unrealized Gain/(Loss)					2,941		(675)
Amount of Interest, Fees or Dividends Credited to Income					278		141
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,050		7,552
Gross Additions					2,998		2,077
Gross Reductions					57		3,283
Ending balance		8,991		6,346	8,991		6,346
Investment, Identifier [Axis]: 423 HAR, LP, LP Interests (423 HAR, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					51		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					996		0
Gross Additions					52		750
Gross Reductions					0		0
Ending balance		1,048		750	1,048		750
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[7]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[8]	$ 0	$ 0	[8]	$ 0
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		18.00%	[8]	18.00%	18.00%	[8]	18.00%	18.00%	[7]
PIK Rate		18.00%	[8]	18.00%	18.00%	[8]	18.00%	18.00%	[7]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(2)		(16)
Amount of Interest, Fees or Dividends Credited to Income					44		27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					418	[7]	0
Gross Additions					60		376
Gross Reductions					2		16
Ending balance		$ 476	[8]	$ 360	$ 476	[8]	$ 360
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		18.00%	[8]	18.00%	18.00%	[8]	18.00%	18.00%	[7]
PIK Rate		18.00%	[8]	18.00%	18.00%	[8]	18.00%	18.00%	[7]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(44)		(558)
Amount of Interest, Fees or Dividends Credited to Income					1,404		1,149
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,895	[7]	11,550
Gross Additions					1,919		1,149
Gross Reductions					44		558
Ending balance		$ 15,770	[8]	$ 12,141	15,770	[8]	12,141
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[7],[9]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[8],[10]	0	$ 0	[8],[10]	0
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.00%	[11],[12],[13]		5.00%	[11],[12],[13]		5.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ 0
Ending balance	[11],[12],[13]	$ 0			$ 0
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.44%	[11],[13],[17]		11.44%	[11],[13],[17]		11.43%	[14],[16]
Spread		6.00%	[11],[13],[17]		6.00%	[11],[13],[17]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,921
Ending balance	[11],[13],[17]	$ 4,162			$ 4,162
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.44%	[11],[13]		11.44%	[11],[13]		11.43%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 19,817
Ending balance	[11],[13]	$ 19,717			$ 19,717
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		11.44%	[11],[13]		11.44%	[11],[13]		11.43%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,372
Ending balance	[11],[13]	$ 1,366			$ 1,366
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.25%	[8],[13]		13.25%	[8],[13]		11.22%	[7],[16]
Spread		4.75%	[8],[13]		4.75%	[8],[13]		5.75%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 10,860
Ending balance	[8],[13]	$ 6,431			6,431
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							7,200
Amount of Unrealized Gain/(Loss)							(8,200)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							9,400
Gross Additions							7,200
Gross Reductions							16,600
Ending balance				0			0
Investment, Identifier [Axis]: AMEREQUIP LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[18]				2,120
Ending balance	[11],[19]	1,920			1,920
Investment, Identifier [Axis]: AMEREQUIP LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[14],[15],[16]							7.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				(108)
Investment, Identifier [Axis]: AMEREQUIP LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]							12.76%
Spread	[14],[16]							7.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				28,422
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(60)		(384)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					100		800
Gross Additions					0		94
Gross Reductions					60		384
Ending balance		40		$ 510	40		$ 510
Investment, Identifier [Axis]: ASC Interests, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					266
Gross Additions					0
Gross Reductions					0
Ending balance		$ 266			$ 266
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					27		27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					400		400
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 400		$ 400	$ 400		$ 400
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(52)
Amount of Interest, Fees or Dividends Credited to Income					109		108
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,597		1,649
Gross Additions					1		0
Gross Reductions					0		52
Ending balance		$ 1,598		$ 1,597	1,598		1,597
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				670
Ending balance	[11]	$ 720			$ 720
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.06%	[11],[13],[20]		12.06%	[11],[13],[20]		12.16%	[14],[16]
Spread		6.50%	[11],[13],[20]		6.50%	[11],[13],[20]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 360
Ending balance	[11],[13],[20]	$ 756			$ 756
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.06%	[11],[13]		11.06%	[11],[13]		11.16%	[14],[16]
Spread		5.50%	[11],[13]		5.50%	[11],[13]		5.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 6,660
Ending balance	[11],[13]	$ 6,660			$ 6,660
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.06%	[11],[13]		13.06%	[11],[13]		13.16%	[14],[16]
Spread		7.50%	[11],[13]		7.50%	[11],[13]		7.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 6,660
Ending balance	[11],[13]	$ 6,660			6,660
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[14]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[11]	$ 0	$ 0	[11]	$ 0
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		5.00%	[11],[21]	5.00%	5.00%	[11],[21]	5.00%	5.00%	[14],[22]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(281)		(277)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					328	[14],[22]	634
Gross Additions					167		126
Gross Reductions					281		277
Ending balance		$ 214	[11],[21]	$ 483	$ 214	[11],[21]	$ 483
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		5.00%	[11],[21]	5.00%	5.00%	[11],[21]	5.00%	5.00%	[14],[22]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(187)		(286)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					473	[14],[22]	1,005
Gross Additions					0		0
Gross Reductions					188		286
Ending balance		$ 285	[11],[21]	$ 719	285	[11],[21]	719
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							3,248
Amount of Unrealized Gain/(Loss)							(3,270)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							3,270
Gross Additions							3,248
Gross Reductions							6,518
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Spread				7.50%			7.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(134)
Amount of Interest, Fees or Dividends Credited to Income							886
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,343
Gross Additions							575
Gross Reductions							6,918
Ending balance				$ 0			0
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(306)
Amount of Interest, Fees or Dividends Credited to Income							1,160
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,598
Gross Additions							1,160
Gross Reductions							3,758
Ending balance				0			0
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[18]				892
Ending balance	[11],[19]	$ 892			$ 892
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.25%	[11],[12],[13]		7.25%	[11],[12],[13]		7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (38)
Ending balance	[11],[12],[13]	$ (105)			$ (105)
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.74%	[11],[13]		12.74%	[11],[13]		12.76%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 24,080
Ending balance	[11],[13]	$ 24,378			$ 24,378
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[11],[12],[13]		7.00%	[11],[12],[13]		7.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (2)
Ending balance	[11],[12],[13]	$ (1)			$ (1)
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.44%	[11],[13]		12.44%	[11],[13]		12.98%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 24,796
Ending balance	[11],[13]	$ 24,482			24,482
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[23]				110
Ending balance	[11],[24]	$ 110			$ 110
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.00%	[11],[13],[25]		11.00%	[11],[13],[25]		11.00%	[14],[16],[26]
Spread		7.00%	[11],[13],[25]		7.00%	[11],[13],[25]		7.00%	[14],[16],[26]
PIK Rate		1.00%	[11],[13],[25]		1.00%	[11],[13],[25]		1.00%	[14],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[26]				$ 7,684
Ending balance	[11],[13],[25]	$ 7,582			$ 7,582
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.00%	[11],[13],[25]		11.00%	[11],[13],[25]		11.00%	[14],[16],[26]
Spread		7.00%	[11],[13],[25]		7.00%	[11],[13],[25]		7.00%	[14],[16],[26]
PIK Rate		1.00%	[11],[13],[25]		1.00%	[11],[13],[25]		1.00%	[14],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[26]				$ 20,784
Ending balance	[11],[13],[25]	$ 19,253			$ 19,253
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.00%	[11],[12],[13]		5.00%	[11],[12],[13]		5.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (8)
Ending balance	[11],[12],[13]	$ (6)			$ (6)
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.61%	[11],[13]		11.61%	[11],[13]		13.50%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		5.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 6,550
Ending balance	[11],[13]	$ 6,517			$ 6,517
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.20%	[11],[13]		15.20%	[11],[13]		15.29%	[14],[16]
Spread		9.75%	[11],[13]		9.75%	[11],[13]		9.75%	[14],[16]
PIK Rate		15.20%	[11],[13]		15.20%	[11],[13]		15.29%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 5,495
Ending balance	[11],[13]	$ 5,787			$ 5,787
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.20%	[11],[13]		15.20%	[11],[13]		15.29%	[14],[16]
Spread		9.75%	[11],[13]		9.75%	[11],[13]		9.75%	[14],[16]
PIK Rate		15.20%	[11],[13]		15.20%	[11],[13]		15.29%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 8,922
Ending balance	[11],[13]	$ 9,416			$ 9,416
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		17.20%	[11],[13],[21]		17.20%	[11],[13],[21]		17.29%	[14],[16],[22]
Spread		11.75%	[11],[13],[21]		11.75%	[11],[13],[21]		11.75%	[14],[16],[22]
PIK Rate		17.20%	[11],[13],[21]		17.20%	[11],[13],[21]		17.29%	[14],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22]				$ 3,369
Ending balance	[11],[13],[21]	$ 3,526			$ 3,526
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		17.20%	[11],[13],[21]		17.20%	[11],[13],[21]		17.29%	[14],[16],[22]
Spread		11.75%	[11],[13],[21]		11.75%	[11],[13],[21]		11.75%	[14],[16],[22]
PIK Rate		17.20%	[11],[13],[21]		17.20%	[11],[13],[21]		17.29%	[14],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22]				$ 5,482
Ending balance	[11],[13],[21]	$ 5,736			5,736
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[22],[27]				134
Ending balance	[8],[21],[28]	76			76
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[22],[27]				647
Ending balance	[8],[21],[28]	374			374
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(4,370)		0
Amount of Interest, Fees or Dividends Credited to Income					(2,811)		171
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(60,384)		14,914
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		0		0	0		0
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					4,370		0
Amount of Interest, Fees or Dividends Credited to Income					2,811		(171)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					60,384		(14,914)
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		0		$ 0	0		$ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate				14.13%			14.13%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,860		0
Gross Additions							0
Gross Reductions							0
Ending balance		$ 5,620		$ 0	$ 5,620		0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1.1
Schedule of Investments [Line Items]
Total Rate		14.13%			14.13%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate		14.13%			14.13%			14.13%
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							566
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 0		3,504
Gross Additions							566
Gross Reductions							0
Ending balance		$ 0		$ 4,070	0		$ 4,070
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					760
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,860
Gross Additions					760
Gross Reductions					0
Ending balance		$ 5,620			$ 5,620
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.38%	[13]		15.38%	[13]		15.38%	[16]
Spread		10.00%	[13]	10.00%	10.00%	[13]	10.00%	10.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					219	[16]	(3)
Gross Additions					1		1
Gross Reductions					0		0
Ending balance		$ 220	[13]	$ (2)	$ 220	[13]	$ (2)
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.38%	[13]	15.25%	15.38%	[13]	15.25%	15.38%	[16]
Spread		10.00%	[13]	10.00%	10.00%	[13]	10.00%	10.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					346		379
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,084	[16]	4,545
Gross Additions					34		39
Gross Reductions					195		140
Ending balance		$ 3,923	[13]	$ 4,444	3,923	[13]	4,444
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[9]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		0	[10]	0	0	[10]	0
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				0
Ending balance	[11]	0			0
Investment, Identifier [Axis]: ArborWorks, LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				14,060
Ending balance	[11]	12,552			12,552
Investment, Identifier [Axis]: ArborWorks, LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				0
Ending balance	[11]	$ 0			$ 0
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.00%	[11],[13]		15.00%	[11],[13]		15.00%	[14]
PIK Rate		15.00%	[11],[13]		15.00%	[11],[13]		15.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 1,907
Ending balance	[11],[13]	$ 3,817			$ 3,817
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.99%	[11],[13]		11.99%	[11],[13]		12.04%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
PIK Rate		11.99%	[11],[13]		11.99%	[11],[13]		12.04%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 7,149
Ending balance	[11],[13]	$ 7,592			7,592
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				2,230
Ending balance	[11]	2,210			2,210
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)
Schedule of Investments [Line Items]
Total Rate				15.00%			15.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Total Rate				16.17%			16.17%
Spread				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							63
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							800
Gross Additions							0
Gross Reductions							0
Ending balance				$ 800			$ 800
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Total Rate				16.17%			16.17%
Spread				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							116
Amount of Interest, Fees or Dividends Credited to Income							317
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							2,086
Gross Additions							116
Gross Reductions							0
Ending balance				$ 2,202			2,202
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	$ 2,333			$ 2,333
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.44%			11.44%
Spread	[11],[13]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 1,632			$ 1,632
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Secured Debt 2
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (25)			$ (25)
Investment, Identifier [Axis]: BP Loenbro Holdings Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.43%			11.43%
Spread	[11],[13]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 26,241			$ 26,241
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					580		(280)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,140	[14]	3,320
Gross Additions					580		0
Gross Reductions					0		280
Ending balance		$ 4,720	[11],[19]	$ 3,040	$ 4,720	[11],[19]	$ 3,040
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		7.00%	[11]	7.00%	7.00%	[11]	7.00%	7.00%	[14]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					26		44
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					711	[14]	711
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 711	[11]	$ 711	711	[11]	711
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(430)		2,055
Amount of Interest, Fees or Dividends Credited to Income					407		574
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,150	[18]	4,095
Gross Additions					0		2,055
Gross Reductions					430		0
Ending balance		$ 5,720	[19]	6,150	$ 5,720	[19]	6,150
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(6)		7
Amount of Interest, Fees or Dividends Credited to Income					18		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	(8)
Gross Additions					451		8
Gross Reductions					6		0
Ending balance		$ 445		0	$ 445		0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					14		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					270		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 270		$ 0	$ 270		$ 0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(67)		78
Amount of Interest, Fees or Dividends Credited to Income					545		583
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,575		10,933
Gross Additions					10		92
Gross Reductions					67		450
Ending balance		$ 10,518		$ 10,575	10,518		10,575
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[29]				200
Ending balance	[11]	878			878
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[18],[29]				2,560
Ending balance	[11],[30]	10			10
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[30]	$ 110			$ 110
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		10.25%	[11],[12],[13]		10.25%	[11],[12],[13]		7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (62)
Ending balance	[11],[12],[13]	$ (55)			$ (55)
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.60%	[11],[13]		15.60%	[11],[13]		12.64%	[14],[16]
Spread		10.25%	[11],[13]		10.25%	[11],[13]		7.25%	[14],[16]
PIK Rate		9.25%	[11],[13]		9.25%	[11],[13]		6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 27,550
Ending balance	[11],[13]	$ 28,880			28,880
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				120
Ending balance	[11]	580			580
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				550
Ending balance	[8]	$ 0			$ 0
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.94%	[8]		13.94%	[8]		16.00%	[7],[16]
Spread		8.50%	[8]		8.50%	[8]		7.50%	[7],[16]
PIK Rate		12.94%	[8]		12.94%	[8]		15.00%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 1,767
Ending balance	[8]	$ 164			$ 164
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.00%	[8],[13]		16.00%	[8],[13]		13.96%	[7],[16]
Spread		7.50%	[8],[13]		7.50%	[8],[13]		8.50%	[7],[16]
PIK Rate		15.00%	[8],[13]		15.00%	[8],[13]		12.96%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 3,446
Ending balance	[8],[13]	$ 2,588			$ 2,588
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[8],[13]	13.94%			13.94%
Spread	[8],[13]	8.50%			8.50%
PIK Rate	[8],[13]	12.94%			12.94%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8],[13]	$ 3,589			$ 3,589
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[9]				120
Ending balance	[8],[10]	0			0
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,680)		(620)
Amount of Interest, Fees or Dividends Credited to Income					18		41
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,990		2,970
Gross Additions					0		0
Gross Reductions					1,680		620
Ending balance		$ 310	[19]	$ 2,350	$ 310	[19]	$ 2,350
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(55)		0
Amount of Interest, Fees or Dividends Credited to Income					16		16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					320		320
Gross Additions					0		0
Gross Reductions					55		0
Ending balance		$ 265		$ 320	$ 265		$ 320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8.00%	[19]	8.00%	8.00%	[19]	8.00%	8.00%	[18]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					3,690		(300)
Amount of Interest, Fees or Dividends Credited to Income					1,390		2,137
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					31,020	[18]	31,420
Gross Additions					3,690		0
Gross Reductions					0		300
Ending balance		$ 34,710	[19]	$ 31,120	$ 34,710	[19]	31,120
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.43%			13.43%			14.48%	[16],[31]
Spread		8.05%			8.05%			9.11%	[16],[31]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(27)
Amount of Interest, Fees or Dividends Credited to Income					6,787
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[31]				96,556
Gross Additions					7,563
Gross Reductions					1,283
Ending balance		$ 102,836			102,836
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.43%	[13],[32]	14.37%	13.43%	[13],[32]	14.37%
Spread		8.05%	[13],[32]	9.19%	8.05%	[13],[32]	9.19%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(71)
Amount of Interest, Fees or Dividends Credited to Income							6,976
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							99,194
Gross Additions							71
Gross Reductions							1,390
Ending balance		$ 102,836	[13],[32]	$ 97,875	$ 102,836	[13],[32]	97,875
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					95
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		0			0
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[33],[34]				0
Ending balance	[11],[35],[36]	0			0
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[33],[34]				500
Ending balance	[11],[35],[36]	$ 500			$ 500
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[11],[12],[13],[35],[36]		7.00%	[11],[12],[13],[35],[36]		7.00%	[14],[15],[16],[33],[34]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[33],[34]				$ (25)
Ending balance	[11],[12],[13],[35],[36]	$ (22)			$ (22)
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.45%	[11],[13],[35],[36]		11.45%	[11],[13],[35],[36]		11.54%	[14],[16],[33],[34]
Spread		6.00%	[11],[13],[35],[36]		6.00%	[11],[13],[35],[36]		6.00%	[14],[16],[33],[34]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[33],[34]				$ 6,405
Ending balance	[11],[13],[35],[36]	$ 6,357			$ 6,357
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.45%	[11],[13],[35],[36]		13.45%	[11],[13],[35],[36]		13.54%	[14],[16],[33],[34]
Spread		8.00%	[11],[13],[35],[36]		8.00%	[11],[13],[35],[36]		8.00%	[14],[16],[33],[34]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[33],[34]				$ 6,405
Ending balance	[11],[13],[35],[36]	$ 6,357			$ 6,357
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.75%	[11],[13],[21],[28]		15.75%	[11],[13],[21],[28]		15.75%	[14],[16],[22],[27]
Spread		7.25%	[11],[13],[21],[28]		7.25%	[11],[13],[21],[28]		7.25%	[14],[16],[22],[27]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22],[27]				$ 761
Ending balance	[11],[13],[21],[28]	$ 761			$ 761
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[11],[13],[21],[28]		15.75%	[11],[13],[21],[28]		15.75%	[14],[16],[22],[27]
Spread		7.25%	[11],[13],[21],[28]		7.25%	[11],[13],[21],[28]		7.25%	[14],[16],[22],[27]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22],[27]				$ 1,075
Ending balance	[11],[13],[21],[28]	$ 750			750
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(320)		(720)
Amount of Interest, Fees or Dividends Credited to Income					60		60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,620	[18]	7,080
Gross Additions					0		0
Gross Reductions					320		720
Ending balance		$ 5,300	[19]	$ 6,360	$ 5,300	[19]	$ 6,360
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.48%	[13]	15.17%	15.48%	[13]	15.17%	15.46%	[16]
Spread		10.00%	[13]	10.00%	10.00%	[13]	10.00%	10.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(63)
Amount of Interest, Fees or Dividends Credited to Income					429		429
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,498	[16]	5,964
Gross Additions					14		0
Gross Reductions					248		311
Ending balance		$ 5,264	[13]	$ 5,653	5,264	[13]	5,653
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					50		50
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,000	[18],[29]	1,000
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 1,000	[19],[30]	$ 1,000	$ 1,000	[19],[30]	$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					579		576
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,813		8,813
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 8,813		$ 8,813	$ 8,813		$ 8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					66		65
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,000		1,000
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 1,000		$ 1,000	1,000		1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[9]				4,290
Ending balance	[10]	4,230			4,230
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(25)		46
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,808		1,828
Gross Additions					0		46
Gross Reductions					25		0
Ending balance		1,783		1,874	1,783		1,874
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(35)		64
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,482		2,512
Gross Additions					0		64
Gross Reductions					35		0
Ending balance		2,447		$ 2,576	2,447		$ 2,576
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				4,080
Ending balance	[35],[39],[40]	3,614			3,614
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				4,358
Ending balance	[19],[35],[39],[40]	4,308			4,308
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				2,448
Ending balance	[19],[35],[39],[40]	$ 2,711			$ 2,711
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		6.00%		6.00%	6.00%		6.00%	6.00%
PIK Rate		6.00%		6.00%	6.00%		6.00%	6.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	0		$ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%	12.00%	[27]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,044
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 12,144	[27]	12,337
Gross Additions							0
Gross Reductions							373
Ending balance				$ 11,964			11,964
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.00%			14.00%
PIK Rate		14.00%			14.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 58			$ 58
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt 1.1
Schedule of Investments [Line Items]
Total Rate		14.00%			14.00%
PIK Rate		14.00%			14.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					563
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,144
Gross Additions					371
Gross Reductions					0
Ending balance		$ 12,515			$ 12,515
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[21],[28]	14.00%			14.00%
PIK Rate	[21],[28]	14.00%			14.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[21],[28]	$ 12,515			$ 12,515
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		14.00%			14.00%
PIK Rate		14.00%			14.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					58
Gross Reductions					0
Ending balance		$ 58			$ 58
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]							10.46%
Spread		5.00%	[11],[12],[13]		5.00%	[11],[12],[13]		5.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 465
Ending balance	[11],[12],[13]	$ 0			$ 0
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.44%	[11],[13]		10.44%	[11],[13]		10.46%	[14],[16]
Spread		5.00%	[11],[13]		5.00%	[11],[13]		5.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 19,681
Ending balance	[11],[13]	$ 19,885			19,885
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,789
Ending balance		2,227			2,227
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Ending balance		0			0
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(590)		1,570
Amount of Interest, Fees or Dividends Credited to Income					1,235		1,647
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					50,130	[18]	49,002
Gross Additions					0		1,568
Gross Reductions					590		0
Ending balance		$ 49,540	[19]	50,570	$ 49,540	[19]	50,570
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							99
Amount of Unrealized Gain/(Loss)							(366)
Amount of Interest, Fees or Dividends Credited to Income							44
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,670
Gross Additions							99
Gross Reductions							1,769
Ending balance				0			0
Investment, Identifier [Axis]: CQ Fluency, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[11],[12],[13]		7.00%	[11],[12],[13]		7.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (66)
Ending balance	[11],[12],[13]	$ (57)			$ (57)
Investment, Identifier [Axis]: CQ Fluency, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread		7.00%	[11],[12],[13]		7.00%	[11],[12],[13]		7.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (66)
Ending balance	[11],[12],[13]	$ (57)			$ (57)
Investment, Identifier [Axis]: CQ Fluency, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.44%	[11],[13]		12.44%	[11],[13]		12.45%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 10,920
Ending balance	[11],[13]	$ 11,001			11,001
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(189)		(80)
Amount of Interest, Fees or Dividends Credited to Income					20		103
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,980	[18]	2,210
Gross Additions					0		0
Gross Reductions					190		80
Ending balance		$ 1,790	[19]	2,130	$ 1,790	[19]	2,130
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		15.00%	[19]		15.00%	[19]		15.00%	[18]
PIK Rate		15.00%	[19]		15.00%	[19]		15.00%	[18]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(2,060)
Amount of Interest, Fees or Dividends Credited to Income							125
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 4,601	[18]	25,495
Gross Additions							0
Gross Reductions							2,060
Ending balance		$ 10,173	[19]	$ 23,435	10,173	[19]	$ 23,435
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					125
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,695
Gross Additions					0
Gross Reductions					0
Ending balance		15,695			15,695
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate				15.00%			15.00%
PIK Rate				15.00%			15.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							301
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,695	[18]	3,994
Gross Additions							301
Gross Reductions							0
Ending balance		$ 15,695	[19]	$ 4,295	$ 15,695	[19]	$ 4,295
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Total Rate		15.00%			15.00%
PIK Rate		15.00%			15.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					572
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,601
Gross Additions					5,572
Gross Reductions					0
Ending balance		$ 10,173			$ 10,173
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.00%		15.25%	14.00%		15.25%	15.69%	[16],[18]
Spread				10.00%			10.00%	10.00%	[16],[18]
PIK Rate		4.00%			4.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(79)		(7)
Amount of Interest, Fees or Dividends Credited to Income					2,088		2,127
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					27,655	[16],[18]	28,000
Gross Additions					299		7
Gross Reductions					79		7
Ending balance		$ 27,875		$ 28,000	27,875		28,000
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[12]	$ 0			$ 0
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.00%			14.00%
PIK Rate		4.00%			4.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 27,875			$ 27,875
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,500		4,500
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 4,500		$ 4,500	$ 4,500		$ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.38%	[13]	11.25%	11.38%	[13]	11.25%	11.38%	[16]
Spread		6.00%	[13]	6.00%	6.00%	[13]	6.00%	6.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					53		10
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					881	[16]	(9)
Gross Additions					1,803		451
Gross Reductions					1,800		0
Ending balance		$ 884	[13]	$ 442	$ 884	[13]	$ 442
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%		12.50%	13.00%		12.50%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,330		1,293
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,906		20,090
Gross Additions					21		20
Gross Reductions					180		0
Ending balance		$ 19,747		$ 20,110	19,747		20,110
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				246
Ending balance	[11]	$ 490			490
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[14],[15],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				(8)
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.61%
Spread	[14],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				7,933
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.61%
Spread	[14],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 6,102
Investment, Identifier [Axis]: Central Moloney, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.08%			12.08%
Spread	[11],[13]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 39,404			$ 39,404
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					460		1,700
Amount of Interest, Fees or Dividends Credited to Income					60		60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,040		8,700
Gross Additions					460		1,700
Gross Reductions					0		0
Ending balance		$ 11,500		$ 10,400	$ 11,500		$ 10,400
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		10.00%	[12],[13]	9.00%	10.00%	[12],[13]	9.00%	9.00%	[15],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					6		6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12],[13]	$ 0	$ 0	[12],[13]	$ 0
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.48%	[13]	14.25%	15.48%	[13]	14.25%	14.48%	[16]
Spread		10.00%	[13]	9.00%	10.00%	[13]	9.00%	9.00%	[16]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							64
Amount of Interest, Fees or Dividends Credited to Income							1,058
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 17,574	[16]	14,954
Gross Additions							76
Gross Reductions							0
Ending balance		$ 20,462	[13]	$ 15,030	$ 20,462	[13]	15,030
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		15.48%			15.48%
Spread		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					223
Amount of Interest, Fees or Dividends Credited to Income					1,383
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					21,974
Gross Reductions					1,512
Ending balance		$ 20,462			20,462
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(62)
Amount of Interest, Fees or Dividends Credited to Income					281
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,574
Gross Additions					0
Gross Reductions					17,574
Ending balance		0			0
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					710		1,020
Amount of Interest, Fees or Dividends Credited to Income					3,396		1,491
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					29,320	[18]	22,920
Gross Additions					710		1,020
Gross Reductions					0		0
Ending balance		30,030	[19]	23,940	30,030	[19]	23,940
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					290		120
Amount of Interest, Fees or Dividends Credited to Income					46		46
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,860	[18],[29]	2,710
Gross Additions					290		120
Gross Reductions					0		0
Ending balance		$ 3,150	[19],[30]	$ 2,830	$ 3,150	[19],[30]	$ 2,830
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[12],[13]	6.00%	6.00%	[12],[13]	6.00%	6.00%	[15],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(45)		77
Amount of Interest, Fees or Dividends Credited to Income					49		4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16]	0
Gross Additions					45		0
Gross Reductions					45		0
Ending balance		$ 0	[12],[13]	$ 0	$ 0	[12],[13]	$ 0
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.49%	[13]	13.36%	13.49%	[13]	13.36%	13.49%	[16]
Spread		8.00%	[13]	8.00%	8.00%	[13]	8.00%	8.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(1)		(6)
Amount of Interest, Fees or Dividends Credited to Income					1,066		1,092
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,620	[16]	16,945
Gross Additions					1		6
Gross Reductions					1		544
Ending balance		$ 15,620	[13]	$ 16,407	$ 15,620	[13]	16,407
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							1,797
Amount of Unrealized Gain/(Loss)							(290)
Amount of Interest, Fees or Dividends Credited to Income							60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,790
Gross Additions							1,797
Gross Reductions							3,587
Ending balance				0			0
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.58%	[11],[13],[20]		12.58%	[11],[13],[20]		12.60%	[14],[16],[41]
Spread		7.00%	[11],[13],[20]		7.00%	[11],[13],[20]		7.00%	[14],[16],[41]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[41]				$ 1,988
Ending balance	[11],[13],[20]	$ 4,394			$ 4,394
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.55%	[11],[13]		12.55%	[11],[13]		12.66%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 35,064
Ending balance	[11],[13]	$ 34,272			$ 34,272
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.55%	[11],[13]		12.55%	[11],[13]		12.66%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,943
Ending balance	[11],[13]	$ 1,899			$ 1,899
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.55%	[11],[13]		12.55%	[11],[13]		12.66%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 4,695
Ending balance	[11],[13]	$ 4,589			4,589
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(110)		460
Amount of Interest, Fees or Dividends Credited to Income					155		246
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,690	[18]	13,340
Gross Additions					0		460
Gross Reductions					110		0
Ending balance		$ 15,580	[19]	$ 13,800	$ 15,580	[19]	$ 13,800
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(244)		(17)
Amount of Interest, Fees or Dividends Credited to Income					528		300
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,694		5,694
Gross Additions					244		17
Gross Reductions					244		17
Ending balance		$ 5,694		$ 5,694	5,694		5,694
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1,010		(1,840)
Amount of Interest, Fees or Dividends Credited to Income					422		275
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,200	[18]	8,220
Gross Additions					1,010		0
Gross Reductions					0		1,840
Ending balance		6,210	[19]	6,380	6,210	[19]	6,380
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(179)		220
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,129	[29]	610
Gross Additions					0		519
Gross Reductions					179		0
Ending balance		950	[30]	1,129	950	[30]	1,129
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%		11.50%	11.50%		11.50%	11.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(64)
Amount of Interest, Fees or Dividends Credited to Income					512		621
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,422		10,440
Gross Additions					0		18
Gross Reductions					621		824
Ending balance		$ 7,801		$ 9,634	$ 7,801		$ 9,634
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					51		52
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,004		1,039
Gross Additions					0		0
Gross Reductions					19		17
Ending balance		$ 985		$ 1,022	985		1,022
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22],[27]				16
Ending balance	[11],[21],[28]	16			16
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					10,365		0
Amount of Unrealized Gain/(Loss)					(7,771)		(6,410)
Amount of Interest, Fees or Dividends Credited to Income					1,470		4,745
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					16,000	[18]	24,637
Gross Additions					10,365		0
Gross Reductions					23,896		6,407
Ending balance		$ 2,469	[19]	$ 18,230	$ 2,469	[19]	$ 18,230
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				11.25%			11.25%	11.69%	[16]
Spread		6.00%		6.00%	6.00%		6.00%	6.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					181		260
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,560	[16]	4,560
Gross Additions					0		0
Gross Reductions					4,560		0
Ending balance		$ 0		$ 4,560	0		$ 4,560
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				8.00%			8.00%	8.00%
Amount of Realized Gain/(Loss)					0		$ 0
Amount of Unrealized Gain/(Loss)					(50)		(21)
Amount of Interest, Fees or Dividends Credited to Income					654		797
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,274		19,274
Gross Additions					50		21
Gross Reductions					19,324		21
Ending balance		0		$ 19,274	0		19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					2,010		6,940
Amount of Interest, Fees or Dividends Credited to Income					1,508		1,446
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					72,470	[18],[29]	58,180
Gross Additions					2,010		6,940
Gross Reductions					0		0
Ending balance		74,480	[19],[30]	65,120	74,480	[19],[30]	65,120
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					4		12
Amount of Interest, Fees or Dividends Credited to Income					31		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					1,264		0
Gross Reductions					1,264		0
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%	12.50%		12.50%	12.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(6)		39
Amount of Interest, Fees or Dividends Credited to Income					2,604		582
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					42,073		0
Gross Additions					6		46,312
Gross Reductions					1,278		0
Ending balance		$ 40,801		$ 46,312	40,801		$ 46,312
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Spread				10.50%			10.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(19)
Amount of Interest, Fees or Dividends Credited to Income							96
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,462
Gross Additions							32
Gross Reductions							1,494
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Spread				10.50%			10.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(280)
Amount of Interest, Fees or Dividends Credited to Income							2,683
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							40,801
Gross Additions							0
Gross Reductions							40,801
Ending balance				$ 0			0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[19]	11,740			11,740
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,440)		1,440
Amount of Interest, Fees or Dividends Credited to Income					1,440		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,400		0
Gross Additions					0		2,400
Gross Reductions					2,400		0
Ending balance		0		2,400	0		2,400
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					4,060		(1,480)
Amount of Interest, Fees or Dividends Credited to Income					556		(1,179)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,680		9,160
Gross Additions					4,060		0
Gross Reductions					0		1,480
Ending balance		11,740		7,680	11,740		7,680
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					4		47
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					0		1,600
Gross Reductions					0		1,600
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					385		(500)
Amount of Interest, Fees or Dividends Credited to Income					1,246		1,406
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					21,627		23,151
Gross Additions					423		28
Gross Reductions					3,910		1,130
Ending balance		$ 18,140		$ 22,049	18,140		22,049
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,520)		(3,450)
Amount of Interest, Fees or Dividends Credited to Income					0		158
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,450	[18]	19,830
Gross Additions					0		0
Gross Reductions					1,520		3,450
Ending balance		$ 12,930	[19]	$ 16,380	$ 12,930	[19]	$ 16,380
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[13]	14.48%			14.48%
Spread	[13]	9.00%			9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[13]	$ 3,097			$ 3,097
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9.00%		9.00%	9.00%		9.00%	9.00%	[15],[16],[27]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16],[27]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.48%		14.25%	14.48%		14.25%	14.48%	[16]
Spread		9.00%		9.00%	9.00%		9.00%	9.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(5)
Amount of Interest, Fees or Dividends Credited to Income					247		355
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,454	[16]	5,241
Gross Additions					0		5
Gross Reductions					357		377
Ending balance		$ 3,097		$ 4,869	3,097		4,869
Investment, Identifier [Axis]: Compass Systems & Sales, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					496
Amount of Interest, Fees or Dividends Credited to Income					120
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,454
Gross Additions					496
Gross Reductions					0
Ending balance		$ 7,950			$ 7,950
Investment, Identifier [Axis]: Compass Systems & Sales, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					42
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15]				0
Gross Additions					1,584
Gross Reductions					0
Ending balance		$ 1,584			$ 1,584
Investment, Identifier [Axis]: Compass Systems & Sales, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%			13.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1,191
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,034
Gross Additions					17
Gross Reductions					0
Ending balance		$ 17,051			$ 17,051
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.47%	[11],[13],[20]		13.47%	[11],[13],[20]		13.52%	[14],[16],[42]
Spread		8.00%	[11],[13],[20]		8.00%	[11],[13],[20]		8.00%	[14],[16],[42]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[42]				$ 4,848
Ending balance	[11],[13],[20]	$ 5,911			$ 5,911
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]							13.52%
Spread		8.00%	[11],[12],[13]		8.00%	[11],[12],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 17,757
Ending balance	[11],[12],[13]	$ (149)			$ (149)
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	13.47%			13.47%
Spread	[11],[13]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 17,906			$ 17,906
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				4,352
Ending balance	[19],[35],[39],[40]	2,542			2,542
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(51)		(223)
Amount of Interest, Fees or Dividends Credited to Income					152		316
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,352		7,657
Gross Additions					0		0
Gross Reductions					1,810		2,095
Ending balance		2,542		5,562	2,542		5,562
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				23,135
Ending balance	[11]	22,430			22,430
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					568	[18],[33],[37],[38]	588
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 568	[19],[35],[39],[40]	588	$ 568	[19],[35],[39],[40]	588
Investment, Identifier [Axis]: Coregistics Buyer LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[13],[36]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13],[36]	$ 389			$ 389
Investment, Identifier [Axis]: Coregistics Buyer LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13],[36]	11.83%			11.83%
Spread	[11],[13],[36]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13],[36]	$ 10,476			$ 10,476
Investment, Identifier [Axis]: Coregistics Buyer LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13],[36]	12.01%			12.01%
Spread	[11],[13],[36]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13],[36]	$ 31,392			$ 31,392
Investment, Identifier [Axis]: Creative Foam Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	5.75%			5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (302)			$ (302)
Investment, Identifier [Axis]: Creative Foam Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.09%			11.09%
Spread	[11],[13]	5.75%			5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 105,508			$ 105,508
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1,020		0
Amount of Interest, Fees or Dividends Credited to Income					1,041		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,000		0
Gross Additions					1,020		15,000
Gross Reductions					0		0
Ending balance		16,020	[19]	15,000	16,020	[19]	15,000
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					5		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,881		1,042
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					28,389		0
Gross Additions					35		28,720
Gross Reductions					975		0
Ending balance		$ 27,449		$ 28,720	27,449		28,720
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,716)		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,660		7,260
Gross Additions					3,068		0
Gross Reductions					1,716		0
Ending balance		$ 9,012		$ 7,260	9,012		$ 7,260
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%	12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(21)
Amount of Interest, Fees or Dividends Credited to Income							1,272
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 18,800		21,200
Gross Additions							21
Gross Reductions							1,221
Ending balance				$ 20,000			20,000
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 560			$ 560
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt 1.1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(28)
Amount of Interest, Fees or Dividends Credited to Income					1,139
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					18,800
Gross Additions					28
Gross Reductions					2,028
Ending balance		$ 16,800			$ 16,800
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 16,800			$ 16,800
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					6
Amount of Interest, Fees or Dividends Credited to Income					8
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					560
Gross Reductions					0
Ending balance		$ 560			$ 560
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8.00%	[11]		8.00%	[11]		8.00%	[14]
PIK Rate		8.00%	[11]		8.00%	[11]		8.00%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				$ 260
Ending balance	[11]	$ 0			$ 0
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Total Rate		10.00%	[11],[19]		10.00%	[11],[19]		10.00%	[14],[18]
PIK Rate		10.00%	[11],[19]		10.00%	[11],[19]		10.00%	[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[18]				$ 1,284
Ending balance	[11],[19]	$ 855			855
Investment, Identifier [Axis]: Dalton US Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				830
Ending balance	[11]	830			830
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					130		(320)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					70		2,670
Gross Additions					130		0
Gross Reductions					0		320
Ending balance		$ 200		$ 2,350	$ 200		$ 2,350
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%		7.50%	7.50%		7.50%	7.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					14		18
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					447		223
Gross Additions					226		583
Gross Reductions					405		90
Ending balance		$ 268		$ 716	$ 268		$ 716
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					491		507
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,587		7,789
Gross Additions					73		78
Gross Reductions					135		135
Ending balance		$ 7,525		$ 7,732	7,525		7,732
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					100		100
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,835	[18]	9,835
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 9,835	[19]	$ 9,835	$ 9,835	[19]	$ 9,835
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.38%	[13]	15.25%	15.38%	[13]	15.25%	15.38%	[16]
Spread		10.00%	[13]	10.00%	10.00%	[13]	10.00%	10.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,116		1,141
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,690	[16]	15,523
Gross Additions					34		0
Gross Reductions					1,453		790
Ending balance		$ 13,271	[13]	$ 14,733	13,271	[13]	14,733
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,140)		1,130
Amount of Interest, Fees or Dividends Credited to Income					0		343
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,740	[18]	22,220
Gross Additions					0		1,130
Gross Reductions					1,140		0
Ending balance		19,600		23,350	19,600		23,350
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate								14.00%
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(14)		(14)
Amount of Interest, Fees or Dividends Credited to Income					48		23
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,233		0
Gross Additions					1,289		14
Gross Reductions					2,522		14
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.00%		13.00%	14.00%		13.00%	14.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(23)		(35)
Amount of Interest, Fees or Dividends Credited to Income					1,797		1,876
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					25,543		27,267
Gross Additions					23		35
Gross Reductions					843		837
Ending balance		$ 24,723		$ 26,465	24,723		26,465
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		241
Amount of Unrealized Gain/(Loss)					35		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,631	[33],[37],[38]	2,898
Gross Additions					35		241
Gross Reductions					45		287
Ending balance		2,621	[35],[39],[40]	2,852	2,621	[35],[39],[40]	2,852
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		757
Amount of Unrealized Gain/(Loss)					111		156
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,443	[33],[37],[38]	9,127
Gross Additions					111		915
Gross Reductions					142		904
Ending balance		8,412	[35],[39],[40]	9,138	8,412	[35],[39],[40]	9,138
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(250)		250
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,580	[14],[29]	1,330
Gross Additions					0		250
Gross Reductions					250		0
Ending balance		$ 1,330	[11],[30]	1,580	$ 1,330	[11],[30]	1,580
Investment, Identifier [Axis]: Dreyfus Government Cash Management
Schedule of Investments [Line Items]
Total Rate		4.94%			4.94%			4.98%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[43]				$ 13,476
Ending balance	[44]	$ 2,226			2,226
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				0
Ending balance	[11]	0			0
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				60
Ending balance	[11]	60			60
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				0
Ending balance	[11]	$ 0			$ 0
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.44%	[11],[13]		11.44%	[11],[13]		10.45%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		5.00%	[14],[16]
PIK Rate		11.44%	[11],[13]		11.44%	[11],[13]		10.45%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,912
Ending balance	[11],[13]	$ 2,026			$ 2,026
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.44%	[11],[13]		13.44%	[11],[13]		12.45%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		7.00%	[14],[16]
PIK Rate		13.44%	[11],[13]		13.44%	[11],[13]		12.45%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,859
Ending balance	[11],[13]	$ 1,998			$ 1,998
Investment, Identifier [Axis]: Dynata, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[8],[13]	14.21%			14.21%
Spread	[8],[13]	8.75%			8.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8],[13]	$ 653			$ 653
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		16
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					42		43
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					760	[18],[33],[37],[38]	1,013
Gross Additions					1		16
Gross Reductions					0		55
Ending balance		$ 761	[19],[35],[40]	974	$ 761	[19],[35],[40]	974
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.49%	[11],[13],[20]		13.49%	[11],[13],[20]		13.50%	[14],[16]
Spread		8.00%	[11],[13],[20]		8.00%	[11],[13],[20]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 927
Ending balance	[11],[13],[20]	$ 2,692			$ 2,692
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.48%	[11],[13]		13.48%	[11],[13]		13.50%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 4,596
Ending balance	[11],[13]	$ 4,193			$ 4,193
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.48%	[11],[13]		13.48%	[11],[13]		13.50%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 9,167
Ending balance	[11],[13]	$ 8,364			$ 8,364
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		13.48%	[11],[13]		13.48%	[11],[13]		13.50%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,901
Ending balance	[11],[13]	$ 1,735			$ 1,735
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		13.48%	[11],[13]		13.48%	[11],[13]		13.50%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 10,403
Ending balance	[11],[13]	$ 9,492			9,492
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(360)		364
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,090		7,603
Gross Additions					0		364
Gross Reductions					360		1,877
Ending balance		5,730		6,090	5,730		6,090
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					80		112
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,670	[29]	1,558
Gross Additions					80		112
Gross Reductions					0		0
Ending balance		$ 1,750	[30]	$ 1,670	$ 1,750	[30]	$ 1,670
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[12],[13]	6.00%	6.00%	[12],[13]	6.00%	6.00%	[15],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					4		4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(7)	[15],[16]	(9)
Gross Additions					1		1
Gross Reductions					0		0
Ending balance		$ (6)	[12],[13]	$ (8)	$ (6)	[12],[13]	$ (8)
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,133		1,151
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					18,632		18,594
Gross Additions					21		19
Gross Reductions					469		0
Ending balance		$ 18,184		$ 18,613	$ 18,184		$ 18,613
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		9.00%		9.00%	9.00%		9.00%	9.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					285		287
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,252		6,294
Gross Additions					2		1
Gross Reductions					24		21
Ending balance		$ 6,230		$ 6,274	$ 6,230		6,274
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.75%	[8],[13]		11.75%	[8],[13]		11.79%	[7],[16]
Spread		6.25%	[8],[13]		6.25%	[8],[13]		6.25%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 8,158
Ending balance	[8],[13]	$ 8,744			8,744
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				1,720
Ending balance	[19],[35],[39],[40]	1,127			1,127
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				899
Ending balance	[19],[35],[39],[40]	899			899
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				1,918
Ending balance	[19],[35],[39],[40]	1,843			1,843
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				5,858
Ending balance	[19],[35],[39],[40]	6,081			6,081
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund XII, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[35],[39],[40]	4,391			4,391
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				1,413
Ending balance	[19],[35],[39],[40]	1,566			1,566
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				4,056
Ending balance	[19],[35],[39],[40]	$ 3,939			$ 3,939
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[13],[20]	14.00%			14.00%
Spread		5.50%	[11],[13],[20]		5.50%	[11],[13],[20]		5.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ 0
Ending balance	[11],[13],[20]	$ 328			$ 328
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.94%	[11],[13]		11.94%	[11],[13]		11.98%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 16,134
Ending balance	[11],[13]	$ 15,827			15,827
Investment, Identifier [Axis]: Escalent, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				730
Ending balance	[11]	$ 780			$ 780
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.00%	[11],[12],[13]		8.00%	[11],[12],[13]		8.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (35)
Ending balance	[11],[12],[13]	$ (31)			$ (31)
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.43%	[11],[13]		13.43%	[11],[13]		13.45%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 26,313
Ending balance	[11],[13]	$ 26,180			$ 26,180
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.60%	[11],[13]		13.60%	[11],[13]		12.61%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 3,626
Ending balance	[11],[13]	$ 3,692			$ 3,692
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.60%	[11],[13]		13.60%	[11],[13]		12.61%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		7.00%	[14],[16]
PIK Rate	[11],[13]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 43,373
Ending balance	[11],[13]	$ 45,712			$ 45,712
Investment, Identifier [Axis]: FCC Intermediate Holdco, LLC (Supplycore), Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 28,691			$ 28,691
Investment, Identifier [Axis]: FCC Intermediate Holdco, LLC (Supplycore), Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[10]	$ 3,920			$ 3,920
Investment, Identifier [Axis]: FCC Intermediate Holdco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1,198
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					28,691
Gross Reductions					0
Ending balance		$ 28,691			28,691
Investment, Identifier [Axis]: FCC Intermediate Holdco, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					3,920
Gross Reductions					0
Ending balance		$ 3,920			$ 3,920
Investment, Identifier [Axis]: Fidelity Government Fund
Schedule of Investments [Line Items]
Total Rate		4.97%			4.97%			5.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[45]	$ 2,307			$ 2,307
Investment, Identifier [Axis]: Fidelity Government Fund
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[46]				$ 1,678
Investment, Identifier [Axis]: Fidelity Treasury
Schedule of Investments [Line Items]
Total Rate		4.95%			4.95%			4.99%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[47]				$ 70
Ending balance	[48]	$ 1,353			1,353
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					7,850		6,770
Amount of Interest, Fees or Dividends Credited to Income					1,570		2,050
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					27,900	[18]	17,580
Gross Additions					7,850		6,770
Gross Reductions					0		0
Ending balance		35,750	[19]	$ 24,350	35,750	[19]	$ 24,350
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread				6.50%			6.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(60)
Amount of Interest, Fees or Dividends Credited to Income							484
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							7,600
Gross Additions							60
Gross Reductions							7,660
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread				9.00%			9.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(162)
Amount of Interest, Fees or Dividends Credited to Income							1,583
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							21,200
Gross Additions							162
Gross Reductions							21,362
Ending balance				$ 0			0
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				3,012
Ending balance	[35],[39],[40]	2,656			2,656
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				3,704
Ending balance	[19],[35],[39],[40]	2,596			2,596
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport Financial SBIC Fund LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(77)		145
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,012		3,483
Gross Additions					0		145
Gross Reductions					356		0
Ending balance		2,656		3,628	2,656		3,628
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport First Lien Loan Fund III LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					255		291
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,704		5,848
Gross Additions					1		0
Gross Reductions					1,109		536
Ending balance		2,596		5,312	2,596		5,312
Investment, Identifier [Axis]: Fuse, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				0
Ending balance	[8]	$ 0			$ 0
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.00%	[8]		12.00%	[8]		12.00%	[7]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				$ 1,320
Ending balance	[8]	$ 1,076			1,076
Investment, Identifier [Axis]: GFG Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,650)		1,170
Amount of Interest, Fees or Dividends Credited to Income					781		102
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,460	[18]	7,140
Gross Additions					0		1,170
Gross Reductions					1,650		0
Ending balance		$ 9,810	[19]	$ 8,310	$ 9,810	[19]	$ 8,310
Investment, Identifier [Axis]: GFG Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.00%		9.00%	8.00%		9.00%	8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(10)		(12)
Amount of Interest, Fees or Dividends Credited to Income					388		525
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,345		11,345
Gross Additions					10		12
Gross Reductions					10		12
Ending balance		$ 9,345		$ 11,345	9,345		11,345
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					84		84
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					44,440		44,440
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 44,440	[19]	$ 44,440	$ 44,440	[19]	$ 44,440
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.48%		11.17%	11.48%		11.17%	11.48%
Spread		6.00%		6.00%	6.00%		6.00%	6.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					2		0
Amount of Interest, Fees or Dividends Credited to Income					163		66
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,400		670
Gross Additions					746		630
Gross Reductions					0		0
Ending balance		$ 3,146		$ 1,300	$ 3,146		$ 1,300
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.48%		13.17%	13.48%		13.17%	13.48%
Spread		8.00%		8.00%	8.00%		8.00%	8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(23)		(23)
Amount of Interest, Fees or Dividends Credited to Income					2,782		2,624
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					40,493		40,493
Gross Additions					23		23
Gross Reductions					23		23
Ending balance		$ 40,493		$ 40,493	$ 40,493		40,493
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16],[49]							11.96%
Spread		6.50%	[11],[12],[13]		6.50%	[11],[12],[13]		6.50%	[14],[16],[49]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[49]				$ 1,545
Ending balance	[11],[12],[13]	$ (9)			(9)
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread	[14],[15],[16]							6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				(9)
Ending balance	[11],[12]	$ (5)			$ (5)
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.94%	[11],[13]		11.94%	[11],[13]		11.96%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 10,624
Ending balance	[11],[13]	$ 10,568			$ 10,568
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		11.94%	[11],[13]		11.94%	[11],[13]		11.96%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 952
Ending balance	[11],[13]	$ 947			$ 947
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		11.94%	[11],[13]		11.94%	[11],[13]		11.96%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 227
Ending balance	[11],[13]	$ 226			$ 226
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.48%	[11],[13],[20]		11.48%	[11],[13],[20]		11.28%	[14],[16],[50]
Spread		6.00%	[11],[13],[20]		6.00%	[11],[13],[20]		5.75%	[14],[16],[50]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[50]				$ 454
Ending balance	[11],[13],[20]	$ 703			$ 703
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.45%	[11],[13]		11.45%	[11],[13]		11.38%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		5.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 301
Ending balance	[11],[13]	$ 297			$ 297
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.48%	[11],[13]		11.48%	[11],[13]		11.25%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		5.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 3,615
Ending balance	[11],[13]	$ 3,561			3,561
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					9,840		19,270
Amount of Interest, Fees or Dividends Credited to Income					3,001		2,904
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					96,710	[18]	50,890
Gross Additions					9,840		19,270
Gross Reductions					0		0
Ending balance		$ 106,550	[19]	$ 70,160	$ 106,550	[19]	$ 70,160
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.50%	[12],[13],[25]	8.50%	7.50%	[12],[13],[25]	8.50%	7.50%	[15],[16],[26]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					3		3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16],[26]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12],[13],[25]	$ 0	$ 0	[12],[13],[25]	$ 0
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.50%	[13],[25]	11.00%	10.50%	[13],[25]	11.00%	10.50%	[16],[26]
Spread		7.50%	[13],[25]	8.00%	7.50%	[13],[25]	8.00%	7.50%	[16],[26]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(61)		(64)
Amount of Interest, Fees or Dividends Credited to Income					2,763		3,598
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					54,078	[16],[26]	64,078
Gross Additions					61		64
Gross Reductions					4,861		4,464
Ending balance		$ 49,278	[13],[25]	$ 59,678	49,278	[13],[25]	59,678
Investment, Identifier [Axis]: Garreco, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(220)
Amount of Interest, Fees or Dividends Credited to Income					43		25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,580		1,800
Gross Additions					0		0
Gross Reductions					0		220
Ending balance		$ 1,580	[19]	$ 1,580	$ 1,580	[19]	$ 1,580
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%	9.50%	[16],[51]
Spread		8.00%		10.00%	8.00%		10.00%	8.00%	[16],[51]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					92		218
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,088	[16],[51]	3,826
Gross Additions					0		0
Gross Reductions					3,088		554
Ending balance		$ 0		$ 3,272	0		3,272
Investment, Identifier [Axis]: Garyline, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				706
Ending balance	[11]	$ 810			$ 810
Investment, Identifier [Axis]: Garyline, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.93%			11.93%
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (256)
Ending balance	[11],[13]	$ 2,812			$ 2,812
Investment, Identifier [Axis]: Garyline, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.93%	[11],[13]		11.93%	[11],[13]		12.22%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 31,529
Ending balance	[11],[13]	$ 32,178			32,178
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					5,910		1,210
Amount of Interest, Fees or Dividends Credited to Income					1,092		1,351
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,070	[18]	6,790
Gross Additions					5,910		1,210
Gross Reductions					0		0
Ending balance		$ 14,980	[19],[35],[36]	8,000	$ 14,980	[19],[35],[36]	8,000
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[12],[35],[36]	7.63%			7.63%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					47
Amount of Interest, Fees or Dividends Credited to Income					111
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance	[12],[35],[36]	$ 0			$ 0
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[35],[36]	13.00%			13.00%
Spread	[35],[36]	7.63%			7.63%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					373
Amount of Interest, Fees or Dividends Credited to Income					2,887
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					40,000
Gross Reductions					0
Ending balance	[35],[36]	$ 40,000			40,000
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		0		0	0		0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(2,460)		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,460		3,780
Gross Additions					0		0
Gross Reductions					2,460		0
Ending balance		$ 0		$ 3,780	$ 0		$ 3,780
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9.50%	[12],[13],[21]	9.50%	9.50%	[12],[13],[21]	9.50%	9.50%	[15],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12],[13],[21]	$ 0	$ 0	[12],[13],[21]	$ 0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[21]	12.50%	12.50%	[21]	12.50%	12.50%
PIK Rate	[21]	12.50%			12.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(336)		0
Amount of Interest, Fees or Dividends Credited to Income					76		151
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,284		2,284
Gross Additions					0		0
Gross Reductions					336		0
Ending balance		$ 1,948	[21]	$ 2,284	1,948	[21]	2,284
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	$ 0			$ 0
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		9.10%	[11],[13]		9.10%	[11],[13]		14.34%	[14],[16],[27]
Spread		3.50%	[11],[13]		3.50%	[11],[13]		9.50%	[14],[16],[27]
PIK Rate		2.50%	[11],[13]		2.50%	[11],[13]		14.34%	[14],[16],[27]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[27]				$ 336
Ending balance	[11],[13]	$ 2,264			$ 2,264
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		2.50%	[11],[21]		2.50%	[11],[21]		14.34%	[14],[16],[27]
Spread	[14],[16],[27]							9.50%
PIK Rate		2.50%	[11],[21]		2.50%	[11],[21]		14.34%	[14],[16],[27]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[27]				$ 3,406
Ending balance	[11],[21]	$ 638			$ 638
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[11],[12],[13]		6.50%	[11],[12],[13]		6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (48)
Ending balance	[11],[12],[13]	$ (42)			$ (42)
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.84%	[11],[13]		11.84%	[11],[13]		11.86%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 6,733
Ending balance	[11],[13]	$ 6,699			$ 6,699
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.86%
Spread		6.50%	[12],[13]		6.50%	[12],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 16,622
Ending balance	[12],[13]	$ (66)			$ (66)
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.84%			11.84%
Spread	[11],[13]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 16,537			$ 16,537
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.83%			11.83%
Spread	[11],[13]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 8,080			$ 8,080
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.98%	[8],[13],[35],[36]		11.98%	[8],[13],[35],[36]		11.53%	[7],[16],[33],[34]
Spread		6.50%	[8],[13],[35],[36]		6.50%	[8],[13],[35],[36]		6.00%	[7],[16],[33],[34]
PIK Rate	[8],[13],[35],[36]	3.50%			3.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[33],[34]				$ 24,397
Ending balance	[8],[13],[35],[36]	$ 25,494			25,494
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (423 COR, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					675
Amount of Interest, Fees or Dividends Credited to Income					88
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,869
Gross Additions					2,175
Gross Reductions					0
Ending balance		4,044			4,044
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (423 COR, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							117
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,400
Gross Additions							0
Gross Reductions							0
Ending balance				1,400			1,400
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 3, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					247		283
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,225		4,331
Gross Additions					247		283
Gross Reductions					0		508
Ending balance		4,472		4,106	4,472		4,106
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 4, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					329		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,773		2,332
Gross Additions					1,211		464
Gross Reductions					0		0
Ending balance		4,984		2,796	4,984		2,796
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 GRE-LP, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[35],[39],[40]	441			441
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 HPP-MS, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				315
Ending balance	[35],[39],[40]	374			374
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				6,050
Ending balance	[19],[35],[39],[40]	8,991			8,991
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 COR, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				1,869
Ending balance	[19],[35],[39],[40]	4,044			4,044
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 HAR, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				996
Ending balance	[35],[39],[40]	1,048			1,048
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				4,225
Ending balance	[19],[35],[39],[40]	4,472			4,472
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 4, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				3,773
Ending balance	[35],[39],[40]	4,984			4,984
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					560		210
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,660		3,280
Gross Additions					560		210
Gross Reductions					0		0
Ending balance		5,220		3,490	5,220		3,490
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					600		0
Amount of Interest, Fees or Dividends Credited to Income					0		131
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,460		17,460
Gross Additions					600		0
Gross Reductions					0		0
Ending balance		18,060	[19]	17,460	18,060	[19]	17,460
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					30		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					920	[29]	920
Gross Additions					30		0
Gross Reductions					0		0
Ending balance		$ 950	[30]	$ 920	$ 950	[30]	$ 920
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.48%	[13]	11.53%	11.48%	[13]	11.53%	11.65%	[16]
Spread		6.00%	[13]	6.00%	6.00%	[13]	6.00%	6.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					142		173
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,974	[16]	3,185
Gross Additions					3,876		4,581
Gross Reductions					3,760		4,100
Ending balance		$ 2,090	[13]	$ 3,666	$ 2,090	[13]	$ 3,666
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%	12.50%		12.50%	12.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(27)		4
Amount of Interest, Fees or Dividends Credited to Income					2,887		2,173
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					45,256		37,800
Gross Additions					27		4,142
Gross Reductions					27		0
Ending balance		$ 45,256		$ 41,942	45,256		41,942
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(130)		1,160
Amount of Interest, Fees or Dividends Credited to Income					34		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,340	[18]	2,400
Gross Additions					0		1,160
Gross Reductions					130		0
Ending balance		$ 3,210	[19]	$ 3,560	$ 3,210	[19]	$ 3,560
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		8.00%		8.00%	8.00%		8.00%	8.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					60		(170)
Amount of Interest, Fees or Dividends Credited to Income					121		121
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,880		3,000
Gross Additions					60		0
Gross Reductions					0		170
Ending balance		$ 2,940		$ 2,830	$ 2,940		$ 2,830
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.81%	[11],[13]		15.81%	[11],[13]		15.91%	[14],[16]
Spread		8.25%	[11],[13]		8.25%	[11],[13]		8.25%	[14],[16]
PIK Rate		2.00%	[11],[13]		2.00%	[11],[13]		2.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 6,581
Ending balance	[11],[13]	$ 7,196			7,196
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Diluted, percentage (as a percent)	[33],[38]							20.00%
Profits, percentage (as a percent)	[33],[38]							21.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[38]				$ 13,490
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Diluted, percentage (as a percent)		20.00%		20.00%	20.00%		20.00%
Profits, percentage (as a percent)		21.75%		21.75%	21.75%		21.75%
Amount of Realized Gain/(Loss)					$ (7,107)		$ 0
Amount of Unrealized Gain/(Loss)					6,710		(1,207)
Amount of Interest, Fees or Dividends Credited to Income					429		1,123
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,490		11,758
Gross Additions					0		1,200
Gross Reductions					13,490		1,207
Ending balance		$ 0		$ 11,751	0		11,751
Investment, Identifier [Axis]: IG Investor, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,400		0
Gross Additions					0		15,096
Gross Reductions					0		0
Ending balance		14,400		15,096	14,400		15,096
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					14		84
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(35)	[15]	0
Gross Additions					4		761
Gross Reductions					0		800
Ending balance		$ (31)	[12]	$ (39)	$ (31)	[12]	$ (39)
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					2,448		896
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					36,934		0
Gross Additions					42		37,333
Gross Reductions					880		0
Ending balance		$ 36,096		$ 37,333	$ 36,096		$ 37,333
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.75%	[8],[12],[13]		5.75%	[8],[12],[13]		5.75%	[7],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]				$ 0
Ending balance	[8],[12],[13]	$ 0			$ 0
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.19%	[8],[13]		11.19%	[8],[13]		10.96%	[7],[16]
Spread		5.75%	[8],[13]		5.75%	[8],[13]		5.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 9,399
Ending balance	[8],[13]	$ 10,154			$ 10,154
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.19%	[8],[13]		11.19%	[8],[13]		10.96%	[7],[16]
Spread		5.75%	[8],[13]		5.75%	[8],[13]		5.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 4,953
Ending balance	[8],[13]	$ 4,928			$ 4,928
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.35%	[8],[13]		11.35%	[8],[13]		11.36%	[7],[16]
Spread		5.75%	[8],[13]		5.75%	[8],[13]		5.75%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 5,325
Ending balance	[8],[13]	$ 5,868			$ 5,868
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		16.46%	[13]		16.46%	[13]		16.59%	[16]
Spread		9.00%	[13]	9.00%	9.00%	[13]	9.00%	9.00%	[16]
PIK Rate		2.00%	[13]	2.00%	2.00%	[13]	2.00%	2.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					86		12
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					816	[16]	0
Gross Additions					365		0
Gross Reductions					0		12
Ending balance		$ 1,181	[13]	$ (12)	$ 1,181	[13]	$ (12)
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.46%	[13]		16.46%	[13]		16.59%	[16]
Spread		9.00%	[13]	9.00%	9.00%	[13]	9.00%	9.00%	[16]
PIK Rate		2.00%	[13]	2.00%	2.00%	[13]	2.00%	2.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					63		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					697	[16]	0
Gross Additions					10		0
Gross Reductions					0		10
Ending balance		$ 707	[13]	$ (10)	$ 707	[13]	$ (10)
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		15.46%	[13]	15.38%	15.46%	[13]	15.38%	15.59%	[16]
Spread		8.00%	[13]	8.00%	8.00%	[13]	8.00%	8.00%	[16]
PIK Rate		2.00%	[13]	2.00%	2.00%	[13]	2.00%	2.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					476		84
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,430	[16]	0
Gross Additions					177		3,252
Gross Reductions					0		0
Ending balance		$ 3,607	[13]	$ 3,252	$ 3,607	[13]	$ 3,252
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		17.46%	[13]	17.38%	17.46%	[13]	17.38%	17.59%	[16]
Spread		10.00%	[13]	10.00%	10.00%	[13]	10.00%	10.00%	[16]
PIK Rate		2.00%	[13]	2.00%	2.00%	[13]	2.00%	2.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					521		86
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,430	[16]	0
Gross Additions					177		3,252
Gross Reductions					0		0
Ending balance		$ 3,607	[13]	$ 3,252	3,607	[13]	3,252
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					569		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,091	[9]	0
Gross Additions					569		2,091
Gross Reductions					0		0
Ending balance		2,660	[10]	2,091	2,660	[10]	2,091
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				1,110
Ending balance	[11]	$ 1,150			$ 1,150
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.28%	[11],[13]		12.28%	[11],[13]		12.41%	[14],[16],[52]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16],[52]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[52]				$ 1,571
Ending balance	[11],[13]	$ 791			$ 791
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.25%	[11],[13]		12.25%	[11],[13]		12.45%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 20,637
Ending balance	[11],[13]	$ 20,663			$ 20,663
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.24%	[11],[13]		14.24%	[11],[13]		14.25%	[14],[16]
Spread		7.75%	[11],[13]		7.75%	[11],[13]		7.75%	[14],[16]
PIK Rate		1.00%	[11],[13]		1.00%	[11],[13]		1.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 17,334
Ending balance	[11],[13]	$ 17,852			17,852
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					420		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,690	[14]	0
Gross Additions					420		18,300
Gross Reductions					0		0
Ending balance		18,110	[11]	18,300	18,110	[11]	18,300
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[29]				690
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate	[14],[18],[29]							10.00%
PIK Rate	[14],[18],[29]							10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[18],[29]				178
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate	[14],[18],[29]							20.00%
PIK Rate	[14],[18],[29]							20.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[18],[29]				120
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16],[53]							12.22%
Spread	[14],[16],[53]							6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[53]				1,390
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]							12.22%
Spread	[14],[16]							6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				19,044
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					512		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,000		0
Gross Additions					368		4,000
Gross Reductions					0		0
Ending balance		$ 4,368	[19]	$ 4,000	$ 4,368	[19]	$ 4,000
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,147		790
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,403		0
Gross Additions					33		17,832
Gross Reductions					2,050		0
Ending balance		$ 15,386		$ 17,832	15,386		17,832
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.21%
Spread	[14],[16]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				1,504
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.21%
Spread	[14],[16]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				7,752
Investment, Identifier [Axis]: Insight Borrower Corporation, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				656
Ending balance	[11]	$ 370			$ 370
Investment, Identifier [Axis]: Insight Borrower Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[11],[12],[13]		6.25%	[11],[12],[13]		6.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (70)
Ending balance	[11],[12],[13]	$ (62)			$ (62)
Investment, Identifier [Axis]: Insight Borrower Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Spread		6.25%	[11],[12],[13]		6.25%	[11],[12],[13]		6.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (57)
Ending balance	[11],[12],[13]	$ (52)			$ (52)
Investment, Identifier [Axis]: Insight Borrower Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.58%	[11],[13]		11.58%	[11],[13]		11.65%	[14],[16]
Spread		6.25%	[11],[13]		6.25%	[11],[13]		6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 14,258
Ending balance	[11],[13]	$ 13,782			13,782
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				240
Ending balance	[11]	$ 90			$ 90
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.44%	[11],[13],[20]		13.44%	[11],[13],[20]		13.53%	[14],[16],[54]
Spread		8.00%	[11],[13],[20]		8.00%	[11],[13],[20]		8.00%	[14],[16],[54]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[54]				$ 776
Ending balance	[11],[13],[20]	$ 723			$ 723
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.43%	[11],[13]		13.43%	[11],[13]		13.55%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 7,177
Ending balance	[11],[13]	$ 6,651			$ 6,651
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.43%	[11],[13]		13.43%	[11],[13]		13.55%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 2,887
Ending balance	[11],[13]	$ 2,675			2,675
Investment, Identifier [Axis]: Integral Energy Services, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					390		(460)
Amount of Interest, Fees or Dividends Credited to Income					21		21
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					160	[14]	1,280
Gross Additions					390		0
Gross Reductions					0		460
Ending balance		$ 550	[11]	$ 820	$ 550	[11]	$ 820
Investment, Identifier [Axis]: Integral Energy Services, Preferred Equity
Schedule of Investments [Line Items]
Total Rate		10.00%	[11],[19]		10.00%	[11],[19]		10.00%	[14]
PIK Rate		10.00%	[11],[19]		10.00%	[11],[19]		10.00%	[14]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					125
Amount of Interest, Fees or Dividends Credited to Income					15
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				300
Gross Additions					140
Gross Reductions					0
Ending balance	[11],[19]	$ 440			$ 440
Investment, Identifier [Axis]: Integral Energy Services, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.06%	[11],[13]	13.04%	13.06%	[11],[13]	13.04%	13.16%	[14],[16]
Spread		7.50%	[11],[13]	7.50%	7.50%	[11],[13]	7.50%	7.50%	[14],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					330		(227)
Amount of Interest, Fees or Dividends Credited to Income					955		1,036
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					13,891	[14],[16]	15,769
Gross Additions					380		33
Gross Reductions					1,570		227
Ending balance		$ 12,701	[11],[13]	$ 15,575	12,701	[11],[13]	15,575
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				0
Ending balance	[11]	$ 0			$ 0
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.44%	[11],[20],[28]		15.44%	[11],[20],[28]		15.48%	[14],[27],[55]
Spread		10.00%	[11],[20],[28]		10.00%	[11],[20],[28]		10.00%	[14],[27],[55]
PIK Rate	[11],[20],[28]	15.43%			15.43%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[27],[55]				$ 1,781
Ending balance	[11],[20],[28]	$ 1,767			$ 1,767
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.44%	[11],[13],[21],[28]		12.44%	[11],[13],[21],[28]		12.46%	[14],[16],[22],[27]
Spread		7.00%	[11],[13],[21],[28]		7.00%	[11],[13],[21],[28]		7.00%	[14],[16],[22],[27]
PIK Rate		12.44%	[11],[13],[21],[28]		12.44%	[11],[13],[21],[28]		12.46%	[14],[16],[22],[27]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22],[27]				$ 431
Ending balance	[11],[13],[21],[28]	$ 99			99
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[7],[16]							11.47%
Spread	[7],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 19,570
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]							12.00%
Spread		6.50%	[11],[12],[13],[20]		6.50%	[11],[12],[13],[20]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 509
Ending balance	[11],[12],[13],[20]	$ (2)			$ (2)
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.98%	[11],[13]		11.98%	[11],[13]		12.00%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 16,515
Ending balance	[11],[13]	$ 16,517			16,517
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,680		1,798
Gross Additions					0		958
Gross Reductions					0		0
Ending balance		2,680		$ 2,756	2,680		$ 2,756
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					711
Gross Reductions					0
Ending balance		$ 711			$ 711
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.50%		13.50%	13.50%		13.50%	13.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					311		307
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,487		4,500
Gross Additions					3		4
Gross Reductions					0		20
Ending balance		$ 4,490		$ 4,484	$ 4,490		$ 4,484
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%		13.50%	13.50%		13.50%	13.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					203		214
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,922		3,130
Gross Additions					2		3
Gross Reductions					0		14
Ending balance		$ 2,924		$ 3,119	$ 2,924		$ 3,119
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.50%		13.50%	13.50%		13.50%	13.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					610		600
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					8,944		8,944
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 8,944		$ 8,944	$ 8,944		$ 8,944
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		13.50%		13.50%	13.50%		13.50%	13.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,363		1,337
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,503		19,559
Gross Additions					26		17
Gross Reductions					2,000		88
Ending balance		$ 17,529		$ 19,488	$ 17,529		$ 19,488
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		13.50%		13.50%	13.50%		13.50%	13.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					752		890
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,273		0
Gross Additions					45		10,857
Gross Reductions					400		38
Ending balance		$ 9,918		$ 10,819	9,918		10,819
Investment, Identifier [Axis]: Isagenix International, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				0
Ending balance	[8]	$ 0			$ 0
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.93%	[8],[13]		11.93%	[8],[13]		11.04%	[7],[16]
Spread		6.50%	[8],[13]		6.50%	[8],[13]		5.50%	[7],[16]
PIK Rate		9.43%	[8],[13]		9.43%	[8],[13]		8.54%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 2,301
Ending balance	[8],[13]	$ 2,655			$ 2,655
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (9)			$ (9)
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.10%			11.10%
Spread	[11],[13]	5.50%			5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 1,703			$ 1,703
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.10%			12.10%
Spread	[11],[13]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 1,703			$ 1,703
Investment, Identifier [Axis]: Island Pump and Tank, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[11],[13]	13.10%			13.10%
Spread	[11],[13]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 1,703			$ 1,703
Investment, Identifier [Axis]: JDC Power Services, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (153)			$ (153)
Investment, Identifier [Axis]: JDC Power Services, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.08%			12.08%
Spread	[11],[13]	6.75%			6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 51,491			$ 51,491
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				1,710
Ending balance	[11]	$ 1,120			$ 1,120
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.83%	[11],[13],[20]		11.83%	[11],[13],[20]		11.64%	[14],[16],[56]
Spread		6.25%	[11],[13],[20]		6.25%	[11],[13],[20]		6.00%	[14],[16],[56]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[56]				$ 3,137
Ending balance	[11],[13],[20]	$ 8,057			$ 8,057
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.83%	[11],[13]		11.83%	[11],[13]		11.61%	[14],[16]
Spread		6.25%	[11],[13]		6.25%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 36,000
Ending balance	[11],[13]	$ 33,990			$ 33,990
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.83%			11.83%
Spread	[11],[13]	6.25%			6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 3,182			$ 3,182
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				1,090
Ending balance	[11]	$ 870			$ 870
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.47%	[11],[13],[17]		12.47%	[11],[13],[17]		12.46%	[14],[16],[57]
Spread		7.00%	[11],[13],[17]		7.00%	[11],[13],[17]		7.00%	[14],[16],[57]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[57]				$ 835
Ending balance	[11],[13],[17]	$ 823			$ 823
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.46%	[11],[13]		15.46%	[11],[13]		12.46%	[14],[16]
Spread		10.00%	[11],[13]		10.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,974
Ending balance	[11],[13]	$ 425			$ 425
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.48%			12.48%
Spread	[11],[13]	7.00%			7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 1,918			$ 1,918
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(90)		(1,460)
Amount of Interest, Fees or Dividends Credited to Income					769		626
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,420	[18]	14,970
Gross Additions					0		0
Gross Reductions					90		1,460
Ending balance		$ 12,330	[19]	$ 13,510	$ 12,330	[19]	$ 13,510
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.75%	[12],[13]	6.75%	6.75%	[12],[13]	6.75%	6.75%	[15],[27]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					3		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[27]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12],[13]	$ 0	$ 0	[12],[13]	$ 0
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.00%	[13]	15.00%	15.00%	[13]	15.00%	15.25%	[16],[27]
Spread		6.75%	[13]	6.75%	6.75%	[13]	6.75%	6.75%	[16],[27]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(3)
Amount of Interest, Fees or Dividends Credited to Income					149		183
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,998	[16],[27]	2,450
Gross Additions					0		3
Gross Reductions					198		3
Ending balance		$ 1,800	[13]	$ 2,450	1,800	[13]	2,450
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8]	0			0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8]	$ 200			$ 200
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		21.59%	[8],[13],[21]		21.59%	[8],[13],[21]		23.63%	[7],[16],[22]
Spread		16.00%	[8],[13],[21]		16.00%	[8],[13],[21]		18.00%	[7],[16],[22]
PIK Rate		21.59%	[8],[13],[21]		21.59%	[8],[13],[21]		23.63%	[7],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[22]				$ 2,074
Ending balance	[8],[13],[21]	$ 0			$ 0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		21.59%	[8],[13],[21]		21.59%	[8],[13],[21]		21.63%	[7],[16],[22]
Spread		16.00%	[8],[13],[21]		16.00%	[8],[13],[21]		16.00%	[7],[16],[22]
PIK Rate		21.59%	[8],[13],[21]		21.59%	[8],[13],[21]		21.63%	[7],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[22]				$ 143
Ending balance	[8],[13],[21]	$ 0			$ 0
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.35%	[8],[13]		14.35%	[8],[13]		21.63%	[7],[16],[22]
Spread		8.75%	[8],[13]		8.75%	[8],[13]		16.00%	[7],[16],[22]
PIK Rate		6.00%	[8],[13]		6.00%	[8],[13]		21.63%	[7],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[22]				$ 137
Ending balance	[8],[13]	$ 1,975			$ 1,975
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[8],[13]	14.35%			14.35%
Spread	[8],[13]	8.75%			8.75%
PIK Rate	[8],[13]	14.35%			14.35%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8],[13]	$ 1,200			$ 1,200
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					3,450		1,010
Amount of Interest, Fees or Dividends Credited to Income					469		91
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,620		5,540
Gross Additions					3,450		1,010
Gross Reductions					0		0
Ending balance		13,070	[19]	$ 6,550	13,070	[19]	$ 6,550
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread				11.50%			11.50%
Amount of Realized Gain/(Loss)					0		$ 0
Amount of Unrealized Gain/(Loss)					(3)		(2)
Amount of Interest, Fees or Dividends Credited to Income					12		6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					3		2
Gross Reductions					3		2
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.00%		16.75%	15.00%		16.75%	15.00%
Spread				11.50%			11.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(29)		(11)
Amount of Interest, Fees or Dividends Credited to Income					1,829		827
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					24,207		9,999
Gross Additions					29		11
Gross Reductions					2,729		172
Ending balance		$ 21,507		$ 9,838	21,507		9,838
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					490		512
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,741	[18]	10,741
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 10,741	[19]	$ 10,741	$ 10,741	[19]	$ 10,741
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,584		1,573
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					25,483		25,432
Gross Additions					30		26
Gross Reductions					647		0
Ending balance		$ 24,866		$ 25,458	24,866		25,458
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					2,050		(3,210)
Amount of Interest, Fees or Dividends Credited to Income					1,135		6,496
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					22,770	[18]	15,570
Gross Additions					2,050		0
Gross Reductions					0		3,210
Ending balance		$ 24,820	[19]	$ 12,360	$ 24,820	[19]	$ 12,360
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9.00%		9.00%	9.00%		9.00%	9.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(8)		49
Amount of Interest, Fees or Dividends Credited to Income					214		320
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,700		0
Gross Additions					8		6,000
Gross Reductions					408		700
Ending balance		$ 4,300		$ 5,300	$ 4,300		5,300
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.73%	[11],[13]		12.73%	[11],[13]		14.75%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		9.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 943
Ending balance	[11],[13]	$ 968			$ 968
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.73%	[11],[13]		12.73%	[11],[13]		14.75%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		9.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 6,782
Ending balance	[11],[13]	$ 6,974			6,974
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(240)		(70)
Amount of Interest, Fees or Dividends Credited to Income					65		60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,730	[29]	2,850
Gross Additions					0		0
Gross Reductions					240		70
Ending balance		2,490	[19],[30]	2,780	2,490	[19],[30]	2,780
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					2,240		510
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,690		7,220
Gross Additions					2,240		510
Gross Reductions					0		0
Ending balance		$ 11,930		$ 7,730	$ 11,930		$ 7,730
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,174		1,407
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,774		20,374
Gross Additions					8		195
Gross Reductions					2,400		0
Ending balance		$ 17,382		$ 20,569	$ 17,382		$ 20,569
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.00%		9.00%	9.00%		9.00%	9.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					174		175
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,805		3,842
Gross Additions					164		1
Gross Reductions					21		19
Ending balance		$ 3,948		$ 3,824	3,948		3,824
Investment, Identifier [Axis]: LKCM Headwater Investments I, L.P., LP Interests
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				2,988
Ending balance	[19],[35],[39],[40]	$ 2,841			$ 2,841
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.68%	[11],[13]		12.68%	[11],[13]		12.71%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 7,960
Ending balance	[11],[13]	$ 8,623			$ 8,623
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.68%	[11],[13]		12.68%	[11],[13]		12.71%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 5,246
Ending balance	[11],[13]	$ 5,512			$ 5,512
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.68%	[11],[13]		12.68%	[11],[13]		12.71%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 2,803
Ending balance	[11],[13]	$ 2,892			$ 2,892
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.68%	[11],[13]		12.68%	[11],[13]		12.71%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 1,056
Ending balance	[11],[13]	$ 1,124			$ 1,124
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		12.67%	[11],[13]		12.67%	[11],[13]		12.71%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 10,694
Ending balance	[11],[13]	$ 11,382			$ 11,382
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.98%	[11],[13]		14.98%	[11],[13]		15.54%	[14],[16]
Spread		9.00%	[11],[13]		9.00%	[11],[13]		9.00%	[14],[16]
PIK Rate		0.50%	[11],[13]		0.50%	[11],[13]		1.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 3,979
Ending balance	[11],[13]	$ 3,900			$ 3,900
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.46%	[8]		10.46%	[8]		10.62%	[7]
Spread		5.00%	[8]		5.00%	[8]		5.00%	[7]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				$ 13,895
Ending balance	[8]	$ 15,139			$ 15,139
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.25%	[11],[13]		13.25%	[11],[13]		13.25%	[14],[16]
Spread		4.75%	[11],[13]		4.75%	[11],[13]		4.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 18,778
Ending balance	[11],[13]	$ 19,266			19,266
Investment, Identifier [Axis]: Looking Glass Investments, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[38]				25
Ending balance	[35],[40]	25			25
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[7],[16]							11.46%
Spread	[7],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				2,803
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[7],[16]							11.46%
Spread	[7],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				3,925
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[7],[16]							11.46%
Spread	[7],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				3,464
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[7],[16]							11.46%
Spread	[7],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				7,796
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					330		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		330		0	330		0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.00%		13.00%	14.00%		13.00%	13.00%	[27]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		1,150
Amount of Interest, Fees or Dividends Credited to Income					369		392
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,022	[27]	4,548
Gross Additions					0		1,150
Gross Reductions					160		195
Ending balance		$ 4,862		$ 5,503	4,862		5,503
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(58)
Amount of Interest, Fees or Dividends Credited to Income					1,089
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18],[33],[37],[38]				14,527
Gross Additions					0
Gross Reductions					58
Ending balance	[19],[35],[39],[40]	$ 14,469			$ 14,469
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[35],[40]	5.00%			5.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					32
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15],[33],[38]				0
Gross Additions					15,500
Gross Reductions					8,500
Ending balance	[35],[40]	$ 7,000			7,000
Investment, Identifier [Axis]: MS Private Loan Fund II, LP, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					85
Amount of Interest, Fees or Dividends Credited to Income					93
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[33],[37],[38]				1,561
Gross Additions					2,249
Gross Reductions					0
Ending balance	[19],[35],[39],[40]	$ 3,810			$ 3,810
Investment, Identifier [Axis]: MS Private Loan Fund II, LP, Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.88%	[35],[40]		8.88%	[35],[40]		8.88%	[16],[33],[38]
Spread		3.50%	[35],[40]		3.50%	[35],[40]		3.50%	[16],[33],[38]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1,446
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[33],[38]				23,367
Gross Additions					32,541
Gross Reductions					6,500
Ending balance	[35],[40]	$ 49,408			49,408
Investment, Identifier [Axis]: MS Private Loan Fund, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(198)
Amount of Interest, Fees or Dividends Credited to Income							776
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							14,833
Gross Additions							0
Gross Reductions							198
Ending balance				14,635			14,635
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							13
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				0			0
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				0			0
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					12,497		11,040
Amount of Interest, Fees or Dividends Credited to Income					6,312		5,916
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					174,063	[18],[58]	122,930
Gross Additions					12,497		11,040
Gross Reductions					0		0
Ending balance		186,560	[19],[59]	133,970	186,560	[19],[59]	133,970
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(131)		(65)
Amount of Interest, Fees or Dividends Credited to Income					868		32
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,025	[18],[33],[38]	753
Gross Additions					5,000		2,000
Gross Reductions					131		65
Ending balance		$ 14,894	[19],[35],[40]	2,688	$ 14,894	[19],[35],[40]	2,688
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.75%	[11],[12],[13]		6.75%	[11],[12],[13]		6.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ 0
Ending balance	[11],[12],[13]	$ 0			$ 0
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.99%	[11],[13]		12.99%	[11],[13]		12.28%	[14],[16]
Spread		7.50%	[11],[13]		7.50%	[11],[13]		6.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 15,049
Ending balance	[11],[13]	$ 14,726			$ 14,726
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.99%			12.99%
Spread	[11],[13]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 4,500			$ 4,500
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(16,642)
Amount of Unrealized Gain/(Loss)							16,642
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							16,642
Gross Reductions							16,642
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread				11.00%			11.00%
Amount of Realized Gain/(Loss)							$ (6,662)
Amount of Unrealized Gain/(Loss)							163
Amount of Interest, Fees or Dividends Credited to Income							453
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,090
Gross Additions							804
Gross Reductions							6,894
Ending balance				$ 0			0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(25,952)
Amount of Unrealized Gain/(Loss)							24,342
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,610
Gross Additions							24,342
Gross Reductions							25,952
Ending balance				0			0
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(137)
Amount of Interest, Fees or Dividends Credited to Income							619
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,537
Gross Additions							0
Gross Reductions							137
Ending balance				$ 1,400			$ 1,400
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate				8.00%			8.00%
PIK Rate				8.00%			8.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							118
Amount of Interest, Fees or Dividends Credited to Income							148
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,010
Gross Additions							235
Gross Reductions							0
Ending balance				$ 6,245			6,245
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				12.75%			12.75%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							1,518
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							23,576
Gross Additions							23
Gross Reductions							0
Ending balance				$ 23,599			23,599
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					1,570
Amount of Interest, Fees or Dividends Credited to Income					434
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,500
Gross Additions					1,570
Gross Reductions					0
Ending balance	[19]	$ 3,070			$ 3,070
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate		8.00%	[19]		8.00%	[19]		8.00%	[18]
PIK Rate		8.00%	[19]		8.00%	[19]		8.00%	[18]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					236
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18]				6,035
Gross Additions					236
Gross Reductions					119
Ending balance	[19]	$ 6,152			6,152
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15]				0
Gross Additions					0
Gross Reductions					0
Ending balance	[12]	$ 0			$ 0
Investment, Identifier [Axis]: Metalforming Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.75%			10.75%			12.75%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					1,370
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					23,623
Gross Additions					31
Gross Reductions					1,146
Ending balance		$ 22,508			$ 22,508
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[11],[12],[13]		6.25%	[11],[12],[13]		6.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (51)
Ending balance	[11],[12],[13]	$ (45)			$ (45)
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.42%	[11],[13]		11.42%	[11],[13]		11.46%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 22,168
Ending balance	[11],[13]	$ 21,448			$ 21,448
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.56%	[11],[13]		12.56%	[11],[13]		12.52%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 17,524
Ending balance	[11],[13]	$ 22,135			22,135
Investment, Identifier [Axis]: Mini Melts of America, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				460
Ending balance	[11]	$ 460			$ 460
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[13],[20]	11.58%			11.58%
Spread		6.25%	[11],[13],[20]		6.25%	[11],[13],[20]		6.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (42)
Ending balance	[11],[13],[20]	$ 1,356			$ 1,356
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13],[17]	11.59%			11.59%
Spread		6.25%	[11],[13],[17]		6.25%	[11],[13],[17]		6.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (16)
Ending balance	[11],[13],[17]	$ 1,034			$ 1,034
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.60%	[11],[13]		10.60%	[11],[13]		10.64%	[14],[16]
Spread		5.25%	[11],[13]		5.25%	[11],[13]		5.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 4,825
Ending balance	[11],[13]	$ 4,929			$ 4,929
Investment, Identifier [Axis]: Mini Melts of America, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.60%	[11],[13]		12.60%	[11],[13]		12.64%	[14],[16]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 4,820
Ending balance	[11],[13]	$ 4,929			4,929
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[33],[34]				678
Ending balance	[11],[35],[36]	$ 678			$ 678
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.00%	[11],[35],[36]		14.00%	[11],[35],[36]		14.00%	[14],[33],[34]
PIK Rate		4.00%	[11],[35],[36]		4.00%	[11],[35],[36]		4.00%	[14],[33],[34]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[33],[34]				$ 3,938
Ending balance	[11],[35],[36]	$ 3,901			$ 3,901
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.00%	[11],[35],[36]		14.00%	[11],[35],[36]		14.00%	[14],[33],[34]
PIK Rate		4.00%	[11],[35],[36]		4.00%	[11],[35],[36]		4.00%	[14],[33],[34]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[33],[34]				$ 11,164
Ending balance	[11],[35],[36]	$ 11,060			$ 11,060
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.00%	[11],[35],[36]		14.00%	[11],[35],[36]		14.00%	[14],[33],[34]
PIK Rate		4.00%	[11],[35],[36]		4.00%	[11],[35],[36]		4.00%	[14],[33],[34]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[33],[34]				$ 17,213
Ending balance	[11],[35],[36]	$ 17,563			$ 17,563
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[35],[36]	8.00%			8.00%
PIK Rate	[11],[35],[36]	8.00%			8.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[35],[36]	$ 163			$ 163
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(290)		4,320
Amount of Interest, Fees or Dividends Credited to Income					1,924		1,977
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					26,390	[18]	22,830
Gross Additions					0		4,320
Gross Reductions					290		0
Ending balance		26,100	[19]	27,150	26,100	[19]	27,150
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					2		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					18		0
Amount of Interest, Fees or Dividends Credited to Income					292		289
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,746		5,746
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 5,746		$ 5,746	5,746		5,746
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,350)		880
Amount of Interest, Fees or Dividends Credited to Income					63		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,730		11,830
Gross Additions					0		880
Gross Reductions					1,350		0
Ending balance		10,380		12,710	10,380		12,710
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[22]				115
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(750)
Amount of Interest, Fees or Dividends Credited to Income							36
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					53		4,615
Gross Additions							0
Gross Reductions							750
Ending balance		50		3,865	50		3,865
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(77)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,466
Gross Additions					0
Gross Reductions					77
Ending balance		1,389			1,389
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(31)
Amount of Interest, Fees or Dividends Credited to Income							(2)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,466	[18]	175
Gross Additions							0
Gross Reductions							30
Ending balance		1,389		$ 145	1,389		$ 145
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(3)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					53
Gross Additions					0
Gross Reductions					3
Ending balance		$ 50			$ 50
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					126		126
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,080		2,080
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 2,080		$ 2,080	2,080		2,080
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					4,390		5,090
Amount of Interest, Fees or Dividends Credited to Income					474		302
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					15,020	[18]	7,700
Gross Additions					4,390		5,090
Gross Reductions					0		0
Ending balance		$ 19,410	[19]	$ 12,790	$ 19,410	[19]	$ 12,790
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[13]	12.48%			12.48%
Spread		7.00%	[13]	7.00%	7.00%	[13]	7.00%	7.00%	[15],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					8		0
Amount of Interest, Fees or Dividends Credited to Income					19		5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16]	0
Gross Additions					1,250		0
Gross Reductions					0		0
Ending balance		$ 1,250	[13]	$ 0	1,250	[13]	$ 0
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%	12.00%
Amount of Realized Gain/(Loss)					0		$ 0
Amount of Unrealized Gain/(Loss)					(121)		6
Amount of Interest, Fees or Dividends Credited to Income					1,205		1,258
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					25,794		20,094
Gross Additions					0		1,200
Gross Reductions					25,794		0
Ending balance		$ 0	[12]	$ 21,294	$ 0	[12]	$ 21,294
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.50%		12.00%	12.50%		12.00%	12.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(11)
Amount of Interest, Fees or Dividends Credited to Income							644
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 10,500		10,500
Gross Additions							11
Gross Reductions							11
Ending balance		$ 62,200		$ 10,500	62,200		10,500
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(43)
Amount of Interest, Fees or Dividends Credited to Income					454
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,500
Gross Additions					0
Gross Reductions					10,500
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.50%			12.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					140
Amount of Interest, Fees or Dividends Credited to Income					1,425
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					62,200
Gross Reductions					0
Ending balance		$ 62,200			62,200
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					198
Amount of Interest, Fees or Dividends Credited to Income					108
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		0			0
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					12,120
Gross Reductions					0
Ending balance		$ 12,120			$ 12,120
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[13]	11.88%			11.88%
Spread	[13]	6.50%			6.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					118
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					10,946
Gross Reductions					0
Ending balance	[13]	$ 10,946			$ 10,946
Investment, Identifier [Axis]: Nello Industries Investco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					751
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					24,556
Gross Reductions					0
Ending balance		$ 24,556			24,556
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					1,860		2,340
Amount of Interest, Fees or Dividends Credited to Income					471		151
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,350	[18]	1,110
Gross Additions					1,860		2,340
Gross Reductions					0		0
Ending balance		$ 8,210	[19]	3,450	$ 8,210	[19]	3,450
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					42		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					1,600		0
Gross Reductions					0		0
Ending balance		$ 1,600		$ 0	$ 1,600		$ 0
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		10.00%	10.00%		10.00%	10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					34		1,500
Amount of Interest, Fees or Dividends Credited to Income					522		616
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,751		8,477
Gross Additions					60		1,545
Gross Reductions					0		1,654
Ending balance		$ 9,811		$ 8,368	$ 9,811		8,368
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[11],[12],[13]		7.00%	[11],[12],[13]		7.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (8)
Ending balance	[11],[12],[13]	$ (7)			$ (7)
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.45%			12.45%
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ 0
Ending balance	[11],[13]	$ 28,605			28,605
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[16]							12.54%
Spread	[14],[16]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				20,467
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[14],[16]							12.52%
Spread	[14],[16]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				7,222
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							340
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,150		8,040
Gross Additions							340
Gross Reductions							0
Ending balance		5,150		8,380	5,150		8,380
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					960
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,240
Gross Additions					960
Gross Reductions					0
Ending balance		10,200			10,200
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					9,240		5,150
Gross Additions							0
Gross Reductions							0
Ending balance		10,200		$ 5,150	10,200		$ 5,150
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,150
Gross Additions					0
Gross Reductions					0
Ending balance		$ 5,150			$ 5,150
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.98%	[13]	11.75%	11.98%	[13]	11.75%	11.98%	[16]
Spread		6.50%	[13]	6.50%	6.50%	[13]	6.50%	6.50%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					221		251
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,600	[16]	4,399
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 3,600	[13]	$ 4,399	$ 3,600	[13]	$ 4,399
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,125		1,119
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					18,426		18,414
Gross Additions					6		6
Gross Reductions					0		0
Ending balance		$ 18,432		$ 18,420	18,432		18,420
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					11,900		6,500
Amount of Interest, Fees or Dividends Credited to Income					2,475		1,350
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					36,380	[18]	22,810
Gross Additions					11,900		6,500
Gross Reductions					0		0
Ending balance		$ 48,280	[19]	$ 29,310	$ 48,280	[19]	$ 29,310
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(16)		(25)
Amount of Interest, Fees or Dividends Credited to Income					766		952
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,750		15,750
Gross Additions					16		25
Gross Reductions					766		1,525
Ending balance		$ 12,000		$ 14,250	12,000		14,250
Investment, Identifier [Axis]: Obra Capital, Inc. (f/k/a Vida Capital, Inc.), Secured Debt
Schedule of Investments [Line Items]
Total Rate	[7]							11.47%
Spread	[7]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				$ 14,897
Investment, Identifier [Axis]: Obra Capital, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (4)			$ (4)
Investment, Identifier [Axis]: Obra Capital, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.95%			12.95%
Spread	[11],[13]	7.50%			7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 25,575			$ 25,575
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock
Schedule of Investments [Line Items]
Total Rate		7.00%		7.00%	7.00%		7.00%	7.00%
PIK Rate		7.00%		7.00%	7.00%		7.00%	7.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
PIK Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(127)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 1,493	[22]	569
Gross Additions							0
Gross Reductions							128
Ending balance		$ 987	[21]	$ 441	$ 987	[21]	$ 441
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1.1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(110)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					326
Gross Additions					0
Gross Reductions					111
Ending balance		$ 215			$ 215
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
PIK Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(130)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 716	[22]	580
Gross Additions							0
Gross Reductions							130
Ending balance		$ 473	[21]	$ 450	$ 473	[21]	$ 450
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(113)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					332
Gross Additions					0
Gross Reductions					112
Ending balance		$ 220			$ 220
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
PIK Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(280)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 332	[22]	1,249
Gross Additions							0
Gross Reductions							280
Ending balance		$ 220	[21]	$ 969	$ 220	[21]	$ 969
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3.1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(243)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					716
Gross Additions					0
Gross Reductions					243
Ending balance		$ 473			$ 473
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
PIK Rate		12.00%	[21]	12.00%	12.00%	[21]	12.00%	12.00%	[22]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							(584)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 326	[22]	2,606
Gross Additions							0
Gross Reductions							584
Ending balance		$ 215	[21]	$ 2,022	$ 215	[21]	$ 2,022
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4.1
Schedule of Investments [Line Items]
Total Rate		12.00%			12.00%
PIK Rate		12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					(506)
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,493
Gross Additions					0
Gross Reductions					506
Ending balance		$ 987			$ 987
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10.00%	[21]	10.00%	10.00%	[21]	10.00%	10.00%	[22]
PIK Rate		10.00%	[21]	10.00%	10.00%	[21]	10.00%	10.00%	[22]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					305	[22]	305
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 305	[21]	$ 305	305	[21]	305
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[9]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[10]	0	$ 0	[10]	0
Investment, Identifier [Axis]: OnPoint, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.33%			12.33%
Spread	[11],[13]	7.00%			7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 3,845			$ 3,845
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					522		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,128		1,056
Gross Additions					522		72
Gross Reductions					0		0
Ending balance		$ 1,650		$ 1,128	$ 1,650		$ 1,128
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[13]	15.48%			15.48%
Spread	[13]	10.00%			10.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[13]	$ 5,200			$ 5,200
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		10.00%		11.00%	10.00%		11.00%	11.00%	[15],[16],[27]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16],[27]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.48%		16.25%	15.48%		16.25%	16.48%	[16]
Spread		10.00%		11.00%	10.00%		11.00%	11.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					83		(61)
Amount of Interest, Fees or Dividends Credited to Income					438		447
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,350	[16]	5,559
Gross Additions					90		6
Gross Reductions					240		141
Ending balance		$ 5,200		$ 5,424	5,200		5,424
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,990)		4,810
Amount of Interest, Fees or Dividends Credited to Income					264		537
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					17,050	[18],[29]	11,750
Gross Additions					0		4,810
Gross Reductions					1,990		0
Ending balance		$ 15,060	[19],[30]	$ 16,560	$ 15,060	[19],[30]	$ 16,560
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11.00%	[12],[13]	11.00%	11.00%	[12],[13]	11.00%	11.00%	[15],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[12],[13]	$ 0	$ 0	[12],[13]	$ 0
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.48%	[13]	16.25%	16.48%	[13]	16.25%	16.48%	[16]
Spread		11.00%	[13]	11.00%	11.00%	[13]	11.00%	11.00%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(23)		142
Amount of Interest, Fees or Dividends Credited to Income					1,852		1,863
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					22,040	[16]	23,429
Gross Additions					23		171
Gross Reductions					103		800
Ending balance		$ 21,960	[13]	$ 22,800	21,960	[13]	22,800
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22]				57
Ending balance	[11],[21]	35			35
Investment, Identifier [Axis]: Other, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		0		0	0		0
Investment, Identifier [Axis]: Other, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		0		0	0		0
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,110)		(880)
Amount of Interest, Fees or Dividends Credited to Income					0		157
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					16,980		18,950
Gross Additions					0		0
Gross Reductions					1,110		880
Ending balance		15,870		18,070	15,870		18,070
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					146		12
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					368	[29]	238
Gross Additions					146		12
Gross Reductions					0		0
Ending balance		$ 514	[30]	$ 250	$ 514	[30]	$ 250
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.75%	[12],[13]	8.75%	8.75%	[12],[13]	8.75%	8.75%	[15],[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(1)		(1)
Amount of Interest, Fees or Dividends Credited to Income					1		1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16]	0
Gross Additions					1		1
Gross Reductions					1		1
Ending balance		$ 0	[12],[13]	$ 0	$ 0	[12],[13]	$ 0
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.23%	[13]	13.63%	14.23%	[13]	13.63%	14.23%	[16]
Spread		8.75%	[13]	8.75%	8.75%	[13]	8.75%	8.75%	[16]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(30)		(39)
Amount of Interest, Fees or Dividends Credited to Income					1,438		1,365
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,877	[16]	21,655
Gross Additions					30		39
Gross Reductions					886		1,404
Ending balance		$ 19,021	[13]	$ 20,290	$ 19,021	[13]	20,290
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.24%	[11],[13],[20],[35],[36]		12.24%	[11],[13],[20],[35],[36]		12.80%	[14],[16],[33],[34],[60]
Spread		6.75%	[11],[13],[20],[35],[36]		6.75%	[11],[13],[20],[35],[36]		7.25%	[14],[16],[33],[34],[60]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[33],[34],[60]				$ 2,998
Ending balance	[11],[13],[20],[35],[36]	$ 4,916			$ 4,916
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.34%	[11],[13],[35],[36]		12.34%	[11],[13],[35],[36]		12.88%	[14],[16],[33],[34]
Spread		6.75%	[11],[13],[35],[36]		6.75%	[11],[13],[35],[36]		7.25%	[14],[16],[33],[34]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[33],[34]				$ 26,263
Ending balance	[11],[13],[35],[36]	$ 21,646			21,646
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[14],[15],[16]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				0
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16],[61]							11.24%
Spread	[14],[16],[61]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[61]				3,186
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.25%
Spread	[14],[16]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				18,490
Investment, Identifier [Axis]: Peaches Holding Corporation, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		7,221			7,221
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					9,250		830
Amount of Interest, Fees or Dividends Credited to Income					5,885		5,708
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					44,090	[18]	43,260
Gross Additions					9,250		830
Gross Reductions					0		0
Ending balance		$ 53,340	[19]	$ 44,090	$ 53,340	[19]	$ 44,090
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		4
Amount of Interest, Fees or Dividends Credited to Income					279		142
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,500		0
Gross Additions					1,500		3,500
Gross Reductions					0		0
Ending balance		$ 5,000		$ 3,500	$ 5,000		$ 3,500
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					110		40
Amount of Interest, Fees or Dividends Credited to Income					1,724		534
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,000		0
Gross Additions					18,219		13,500
Gross Reductions					0		0
Ending balance		$ 38,219		$ 13,500	$ 38,219		$ 13,500
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(13)		(35)
Amount of Interest, Fees or Dividends Credited to Income					1,692		1,722
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					27,681		28,681
Gross Additions					13		35
Gross Reductions					13		1,035
Ending balance		$ 27,681		$ 27,681	27,681		27,681
Investment, Identifier [Axis]: Pinnacle TopCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					2,790
Amount of Interest, Fees or Dividends Credited to Income					853
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,540
Gross Additions					2,790
Gross Reductions					0
Ending balance	[19]	15,330			15,330
Investment, Identifier [Axis]: Pinnacle TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate								8.00%
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					12
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					444
Gross Additions					2
Gross Reductions					460
Ending balance	[12]	$ (14)			$ (14)
Investment, Identifier [Axis]: Pinnacle TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					2,044
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					30,339
Gross Additions					30
Gross Reductions					0
Ending balance		$ 30,369			30,369
Investment, Identifier [Axis]: Power System Solutions, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				1,160
Ending balance	[11]	$ 2,140			$ 2,140
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[11],[12],[13]		6.50%	[11],[12],[13]		6.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (82)
Ending balance	[11],[12],[13]	$ (73)			$ (73)
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.84%			11.84%
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (82)
Ending balance	[11],[13]	$ 6,155			$ 6,155
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.82%	[11],[13]		11.82%	[11],[13]		12.12%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 18,418
Ending balance	[11],[13]	$ 18,326			$ 18,326
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.83%	[11],[13]		10.83%	[11],[13]		12.28%	[14],[16]
Spread		5.50%	[11],[13]		5.50%	[11],[13]		6.85%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 7,960
Ending balance	[11],[13]	$ 7,884			$ 7,884
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.83%	[11],[13]		10.83%	[11],[13]		12.20%	[14],[16]
Spread		5.50%	[11],[13]		5.50%	[11],[13]		6.85%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 760
Ending balance	[11],[13]	$ 753			$ 753
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	10.83%			10.83%
Spread	[11],[13]	5.50%			5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 756			$ 756
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[11],[13]	10.58%			10.58%
Spread	[11],[13]	5.25%			5.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 851			$ 851
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(90)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					510		590
Gross Additions					0		0
Gross Reductions					0		90
Ending balance		510		500	510		500
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					50		(1,940)
Amount of Interest, Fees or Dividends Credited to Income					491		429
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					10,750	[18]	12,420
Gross Additions					50		0
Gross Reductions					0		1,940
Ending balance		$ 10,800	[19]	10,480	$ 10,800	[19]	10,480
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.00%			13.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					399
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,829
Gross Additions					12
Gross Reductions					0
Ending balance		$ 5,841			5,841
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions							0
Gross Reductions							0
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				13.00%			13.00%	13.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							397
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,829		5,806
Gross Additions							11
Gross Reductions							0
Ending balance				$ 5,817			5,817
Investment, Identifier [Axis]: Purge Rite, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	290			290
Investment, Identifier [Axis]: Purge Rite, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				3,281
Ending balance	[11]	$ 3,248			$ 3,248
Investment, Identifier [Axis]: Purge Rite, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.00%	[11],[12],[13]		8.00%	[11],[12],[13]		8.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (47)
Ending balance	[11],[12],[13]	$ (42)			$ (42)
Investment, Identifier [Axis]: Purge Rite, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.57%	[11],[13]		13.57%	[11],[13]		13.70%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 9,610
Ending balance	[11],[13]	$ 9,844			9,844
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(98)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					460		525
Gross Additions					0		33
Gross Reductions					0		98
Ending balance		460		460	460		460
Investment, Identifier [Axis]: Quality Lease Service, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					(2,505)		0
Amount of Unrealized Gain/(Loss)					2,500		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					2,500		0
Gross Reductions					2,500		0
Ending balance		$ 0		0	$ 0		0
Investment, Identifier [Axis]: Quality Lease Service, LLC, Secured Debt
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(29,526)
Amount of Unrealized Gain/(Loss)							29,865
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							29,865
Gross Reductions							29,865
Ending balance				0			0
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.19%	[11],[13]		12.19%	[11],[13]		12.22%	[14],[16],[53]
Spread		6.75%	[11],[13]		6.75%	[11],[13]		6.75%	[14],[16],[53]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[53]				$ 772
Ending balance	[11],[13]	$ 1,222			$ 1,222
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.19%	[11],[13]		12.19%	[11],[13]		12.21%	[14],[16]
Spread		6.75%	[11],[13]		6.75%	[11],[13]		6.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 12,512
Ending balance	[11],[13]	$ 12,786			12,786
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]							13.21%
Spread	[14],[16]							7.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				534
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]							13.19%
Spread	[14],[16]							7.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				13,951
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[16]							13.19%
Spread	[14],[16]							7.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				559
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[7],[16]							11.14%
Spread	[7],[16]							5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 14,715
Investment, Identifier [Axis]: Richardson Sales Solutions, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.82%	[11],[13],[20]		11.82%	[11],[13],[20]		18.47%	[14],[16],[62]
Spread		6.50%	[11],[13],[20]		6.50%	[11],[13],[20]		6.50%	[14],[16],[62]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[62]				$ 3,109
Ending balance	[11],[13],[20]	$ 5,067			$ 5,067
Investment, Identifier [Axis]: Richardson Sales Solutions, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.82%	[11],[13]		11.82%	[11],[13]		11.88%	[14],[16]
Spread		6.50%	[11],[13]		6.50%	[11],[13]		6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 39,376
Ending balance	[11],[13]	$ 39,598			39,598
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					(409)		0
Amount of Unrealized Gain/(Loss)					80		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,710	[29]	3,620
Gross Additions					80		0
Gross Reductions					0		0
Ending balance		3,790	[30]	3,620	3,790	[30]	3,620
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(8,740)
Amount of Interest, Fees or Dividends Credited to Income					6		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		14,880
Gross Additions					0		0
Gross Reductions					0		8,740
Ending balance		$ 0		6,140	$ 0		6,140
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
PIK Rate		10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					8		16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					(26)	[15]	(35)
Gross Additions					2		4
Gross Reductions					0		0
Ending balance		$ (24)	[12],[21]	$ (31)	$ (24)	[12],[21]	$ (31)
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[21]	12.50%	12.50%	[21]	12.50%	12.50%
PIK Rate	[21]	10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(12,978)		(444)
Amount of Interest, Fees or Dividends Credited to Income					1,083		2,255
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					30,798		35,404
Gross Additions					19		40
Gross Reductions					13,429		1,119
Ending balance		$ 17,388	[21]	$ 34,325	17,388	[21]	34,325
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 0
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[11],[12],[13]		6.50%	[11],[12],[13]		6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ 0
Ending balance	[11],[12],[13]	$ 0			$ 0
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.56%	[11],[13]		12.56%	[11],[13]		12.16%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		6.50%	[14],[16]
PIK Rate	[11],[13]	0.50%			0.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 3,314
Ending balance	[11],[13]	$ 3,369			$ 3,369
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.56%	[11],[13]		14.56%	[11],[13]		14.16%	[14],[16]
Spread		9.00%	[11],[13]		9.00%	[11],[13]		8.50%	[14],[16]
PIK Rate	[11],[13]	0.50%			0.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 3,266
Ending balance	[11],[13]	$ 3,327			$ 3,327
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.52%	[11],[13]		13.52%	[11],[13]		13.54%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		6.00%	[14],[16]
PIK Rate		2.00%	[11],[13]		2.00%	[11],[13]		2.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 5,744
Ending balance	[11],[13]	$ 5,828			$ 5,828
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.52%	[11],[13]		13.52%	[11],[13]		13.54%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		6.00%	[14],[16]
PIK Rate		2.00%	[11],[13]		2.00%	[11],[13]		2.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 8,086
Ending balance	[11],[13]	$ 7,787			7,787
Investment, Identifier [Axis]: SI East, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(1,480)		1,823
Amount of Interest, Fees or Dividends Credited to Income					1,858		639
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					19,170	[18]	13,650
Gross Additions					0		2,130
Gross Reductions					1,480		0
Ending balance		$ 17,690	[19]	15,780	$ 17,690	[19]	15,780
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.75%			11.75%			11.25%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					(2)		0
Amount of Interest, Fees or Dividends Credited to Income					121		14
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,125		0
Gross Additions					2,252		0
Gross Reductions					1,127		0
Ending balance		$ 2,250		$ 0	$ 2,250		$ 0
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.62%	[63]	12.78%	12.62%	[63]	12.78%	12.47%	[64]
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							268
Amount of Interest, Fees or Dividends Credited to Income							568
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					$ 54,536	[64]	0
Gross Additions							54,536
Gross Reductions							0
Ending balance		$ 67,661	[63]	$ 54,536	67,661	[63]	54,536
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					(241)
Amount of Interest, Fees or Dividends Credited to Income					2,599
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					54,536
Gross Additions					0
Gross Reductions					54,536
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.62%			12.62%
Amount of Realized Gain/(Loss)					$ 0		0
Amount of Unrealized Gain/(Loss)					58		(79)
Amount of Interest, Fees or Dividends Credited to Income					1,464		3,885
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		89,786
Gross Additions					67,661		0
Gross Reductions					0		89,786
Ending balance		$ 67,661		0	67,661		0
Investment, Identifier [Axis]: SPAU Holdings, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				500
Ending balance	[11]	$ 610			$ 610
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.98%			12.98%
Spread		7.50%	[11],[13]		7.50%	[11],[13]		8.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ 0
Ending balance	[11],[13]	$ 1,533			$ 1,533
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.98%	[11],[13]		12.98%	[11],[13]		13.72%	[14],[16]
Spread		7.50%	[11],[13]		7.50%	[11],[13]		8.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 15,728
Ending balance	[11],[13]	$ 15,648			15,648
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					26		320
Amount of Interest, Fees or Dividends Credited to Income					234		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,310		1,530
Gross Additions					26		320
Gross Reductions					456		0
Ending balance		$ 1,880	[19]	$ 1,850	$ 1,880	[19]	$ 1,850
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.00%		14.00%	14.00%		14.00%	14.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					86		(22)
Amount of Interest, Fees or Dividends Credited to Income					1,231		980
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					11,440		13,840
Gross Additions					7,600		22
Gross Reductions					960		822
Ending balance		$ 18,080		$ 13,040	18,080		13,040
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				836
Ending balance	[11]	$ 835			$ 835
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.46%
Spread		6.00%	[11],[12],[13]		6.00%	[11],[12],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 394
Ending balance	[11],[12],[13]	$ (44)			$ (44)
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.44%	[11],[13]		11.44%	[11],[13]		11.70%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 34,886
Ending balance	[11],[13]	$ 33,249			$ 33,249
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.04%	[8],[13]		11.04%	[8],[13]		11.04%	[7],[16]
Spread		5.50%	[8],[13]		5.50%	[8],[13]		5.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 7,527
Ending balance	[8],[13]	$ 7,970			$ 7,970
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.19%	[8],[13]		11.19%	[8],[13]		11.28%	[7],[16]
Spread		5.75%	[8],[13]		5.75%	[8],[13]		5.75%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 8,977
Ending balance	[8],[13]	$ 9,171			9,171
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[14]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[11]	$ 0	$ 0	[11]	$ 0
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.50%	[11],[21]	8.50%	8.50%	[11],[21]	8.50%	8.50%	[14],[22]
PIK Rate		8.50%	[11],[21]	8.50%	8.50%	[11],[21]	8.50%	8.50%	[14],[22]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(1,546)		0
Amount of Interest, Fees or Dividends Credited to Income					0		216
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,190	[14],[22]	4,556
Gross Additions					0		214
Gross Reductions					1,546		0
Ending balance		$ 1,644	[11],[21]	$ 4,770	1,644	[11],[21]	4,770
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					490		1,140
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,940		4,500
Gross Additions					490		1,140
Gross Reductions					0		0
Ending balance		6,430		$ 5,640	6,430		$ 5,640
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.00%			12.00%	12.00%
Amount of Realized Gain/(Loss)					0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,193		1,285
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					20,427		21,378
Gross Additions					73		27
Gross Reductions					20,500		1,000
Ending balance		$ 0		$ 20,405	$ 0		20,405
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.58%	[8],[13]		10.58%	[8],[13]		10.88%	[7],[16]
Spread		5.00%	[8],[13]		5.00%	[8],[13]		5.00%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 14,717
Ending balance	[8],[13]	$ 14,741			14,741
Investment, Identifier [Axis]: Tectonic Financial, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18]				5,030
Ending balance	[19]	4,720			4,720
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(1,391)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		7,681
Gross Additions					0		0
Gross Reductions					0		1,391
Ending balance		0		6,290	0		6,290
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		178
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		533
Gross Reductions					0		0
Ending balance		0		$ 533	0		$ 533
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		$ 0			$ 0
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%	[21],[28]	12.00%	12.00%	[21],[28]	12.00%	12.00%	[27]
PIK Rate	[21],[28]	12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					56		111
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,726	[27]	1,840
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 1,726	[21],[28]	$ 1,840	$ 1,726	[21],[28]	$ 1,840
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.00%	[21],[28]	12.00%	12.00%	[21],[28]	12.00%	12.00%	[27]
PIK Rate	[21],[28]	12.00%			12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(9,605)		0
Amount of Interest, Fees or Dividends Credited to Income					461		923
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					14,262	[27]	15,120
Gross Additions					0		7
Gross Reductions					9,605		0
Ending balance		$ 4,657	[21],[28]	$ 15,127	4,657	[21],[28]	15,127
Investment, Identifier [Axis]: Televerde, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(2,164)		674
Amount of Interest, Fees or Dividends Credited to Income					0		592
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					4,734	[18]	5,408
Gross Additions					0		674
Gross Reductions					2,164		0
Ending balance		2,570		6,082	2,570		6,082
Investment, Identifier [Axis]: Televerde, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					1,794		1,794
Gross Additions					0		0
Gross Reductions					1		0
Ending balance		1,793		1,794	1,793		1,794
Investment, Identifier [Axis]: Tex Tech Tennis, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[29]				2,840
Ending balance	[11],[30]	2,680			2,680
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							80
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							6,400
Gross Additions							0
Gross Reductions							0
Ending balance				6,400			6,400
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					172
Ending balance		236			236
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					53
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					6,400
Gross Additions					0
Gross Reductions					0
Ending balance		6,400			6,400
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[18]				6,400
Ending balance	[19]	6,400			6,400
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					172
Gross Additions					64
Gross Reductions					0
Ending balance		236			236
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate								13.00%
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					9		12
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					150		106
Gross Additions					642		1,962
Gross Reductions					800		2,080
Ending balance		$ (8)	[12]	$ (12)	$ (8)	[12]	$ (12)
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.00%		13.00%	10.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		(129)
Amount of Interest, Fees or Dividends Credited to Income					440		607
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,347		9,442
Gross Additions					14		15
Gross Reductions					1,200		729
Ending balance		$ 6,161		$ 8,728	6,161		8,728
Investment, Identifier [Axis]: Titan Meter Midco Corp., Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	$ 1,219			$ 1,219
Investment, Identifier [Axis]: Titan Meter Midco Corp., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (118)			$ (118)
Investment, Identifier [Axis]: Titan Meter Midco Corp., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.83%			11.83%
Spread	[11],[13]	6.50%			6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 33,417			$ 33,417
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					(2,970)		3,970
Amount of Interest, Fees or Dividends Credited to Income					58		58
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,740	[18]	7,800
Gross Additions					0		3,970
Gross Reductions					2,970		0
Ending balance		9,770	[19]	11,770	9,770	[19]	11,770
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(2)
Amount of Interest, Fees or Dividends Credited to Income					2		4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15]	0
Gross Additions					0		2
Gross Reductions					0		2
Ending balance		$ 0	[12]	$ 0	$ 0	[12]	$ 0
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%		12.00%	13.50%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					71		(9)
Amount of Interest, Fees or Dividends Credited to Income					529		487
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,920		7,920
Gross Additions					0		9
Gross Reductions					0		9
Ending balance		$ 7,920		$ 7,920	$ 7,920		7,920
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[8],[13],[21]		12.50%	[8],[13],[21]		12.53%	[7],[16],[22]
Spread		7.15%	[8],[13],[21]		7.15%	[8],[13],[21]		7.15%	[7],[16],[22]
PIK Rate		6.00%	[8],[13],[21]		6.00%	[8],[13],[21]		6.00%	[7],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[22]				$ 3,333
Ending balance	[8],[13],[21]	$ 4,025			4,025
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[22]				0
Ending balance	[8],[21]	0			0
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.46%
Spread	[14],[16]							6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				23,101
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.96%
Spread	[14],[16]							6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				9,017
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.96%
Spread	[14],[16]							6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				4,689
Investment, Identifier [Axis]: UniTek Global Services, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[7]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[8]	$ 0	$ 0	[8]	$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1
Schedule of Investments [Line Items]
Total Rate		20.00%	[8],[19]	20.00%	20.00%	[8],[19]	20.00%	20.00%	[7],[18]
PIK Rate		20.00%	[8],[19]	20.00%	20.00%	[8],[19]	20.00%	20.00%	[7],[18]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(224)		(221)
Amount of Interest, Fees or Dividends Credited to Income					270		221
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,833	[7],[18]	2,833
Gross Additions					271		221
Gross Reductions					224		221
Ending balance		$ 2,880	[8],[19]	$ 2,833	$ 2,880	[8],[19]	$ 2,833
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2
Schedule of Investments [Line Items]
Total Rate		20.00%	[8]	20.00%	20.00%	[8]	20.00%	20.00%	[7]
PIK Rate		20.00%	[8]	20.00%	20.00%	[8]	20.00%	20.00%	[7]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					140		1,668
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,698	[7]	1,991
Gross Additions					140		1,668
Gross Reductions					0		0
Ending balance		$ 3,838	[8]	$ 3,659	$ 3,838	[8]	$ 3,659
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3
Schedule of Investments [Line Items]
Total Rate		19.00%	[8]	19.00%	19.00%	[8]	19.00%	19.00%	[7]
PIK Rate		19.00%	[8]	19.00%	19.00%	[8]	19.00%	19.00%	[7]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[7]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[8]	$ 0	$ 0	[8]	$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 4
Schedule of Investments [Line Items]
Total Rate		13.50%	[8]	13.50%	13.50%	[8]	13.50%	13.50%	[7]
PIK Rate		13.50%	[8]	13.50%	13.50%	[8]	13.50%	13.50%	[7]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[7]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[8]	$ 0	$ 0	[8]	$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt
Schedule of Investments [Line Items]
Total Rate				15.00%			15.00%
PIK Rate				15.00%			15.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							1,380
Amount of Interest, Fees or Dividends Credited to Income							187
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							4,592
Gross Additions							1,567
Gross Reductions							0
Ending balance				$ 6,159			$ 6,159
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt 1
Schedule of Investments [Line Items]
Total Rate		15.00%	[8]		15.00%	[8]		15.00%	[7]
PIK Rate		15.00%	[8]		15.00%	[8]		15.00%	[7]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					132
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				3,889
Gross Additions					132
Gross Reductions					0
Ending balance	[8]	$ 4,021			$ 4,021
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt 2
Schedule of Investments [Line Items]
Total Rate		15.00%	[8]		15.00%	[8]		15.00%	[7]
PIK Rate		15.00%	[8]		15.00%	[8]		15.00%	[7]
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					65
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]				1,908
Gross Additions					64
Gross Reductions					0
Ending balance	[8]	$ 1,972			1,972
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread				7.50%			7.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							22
Amount of Interest, Fees or Dividends Credited to Income							(2)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							382
Gross Additions							25
Gross Reductions							407
Ending balance				$ 0			$ 0
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Spread				7.50%			7.50%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							96
Amount of Interest, Fees or Dividends Credited to Income							282
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							1,712
Gross Additions							112
Gross Reductions							1,824
Ending balance				$ 0			0
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					197		(964)
Amount of Interest, Fees or Dividends Credited to Income					0		25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					5,694	[33],[37],[38]	5,855
Gross Additions					198		531
Gross Reductions					168		1,162
Ending balance		5,724	[35],[39],[40]	5,224	5,724	[35],[39],[40]	5,224
Investment, Identifier [Axis]: UnionRock Energy Fund III, LP, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					994		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,838	[33],[37],[38]	0
Gross Additions					3,494		150
Gross Reductions					0		0
Ending balance		6,332	[35],[39],[40]	150	6,332	[35],[39],[40]	150
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[14],[29]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[11],[30]	$ 0	$ 0	[11],[30]	$ 0
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		14.00%	[11],[30]	14.00%	14.00%	[11],[30]	14.00%	14.00%	[14],[29]
PIK Rate		14.00%	[11],[30]	14.00%	14.00%	[11],[30]	14.00%	14.00%	[14],[29]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(150)		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					150	[14],[29]	220
Gross Additions					0		0
Gross Reductions					150		0
Ending balance		$ 0	[11],[30]	$ 220	$ 0	[11],[30]	220
Investment, Identifier [Axis]: Urgent DSO LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate	[19]	9.00%			9.00%
PIK Rate	[19]	9.00%			9.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					136
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					4,136
Gross Reductions					0
Ending balance	[19]	$ 4,136			$ 4,136
Investment, Identifier [Axis]: Urgent DSO LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.50%			13.50%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					631
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					8,718
Gross Reductions					0
Ending balance		$ 8,718			$ 8,718
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.81%	[11],[13]		12.81%	[11],[13]		12.99%	[14],[16]
Spread		7.50%	[11],[13]		7.50%	[11],[13]		7.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 4,000
Ending balance	[11],[13]	$ 4,000			4,000
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[18]				2,570
Ending balance	[11],[19]	2,570			2,570
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(100)
Amount of Interest, Fees or Dividends Credited to Income					204		215
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,240	[18],[29]	11,940
Gross Additions					0		0
Gross Reductions					0		100
Ending balance		$ 12,240	[19],[30]	$ 11,840	$ 12,240	[19],[30]	$ 11,840
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.00%	[12],[13]	6.00%	6.00%	[12],[13]	6.00%	6.00%	[15],[16],[27]
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					8		15
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[15],[16],[27]	(21)
Gross Additions					0		11
Gross Reductions					0		0
Ending balance		$ 0	[12],[13]	$ (10)	$ 0	[12],[13]	$ (10)
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%		11.50%	11.50%		11.50%	11.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					1,648		1,768
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					28,035		30,161
Gross Additions					34		39
Gross Reductions					1,160		1,242
Ending balance		$ 26,909		$ 28,958	$ 26,909		28,958
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.25%	[8],[12],[13]		5.25%	[8],[12],[13]		5.25%	[7],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]				$ (408)
Ending balance	[8],[12],[13]	$ (296)			$ (296)
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.59%	[8],[13]		11.59%	[8],[13]		11.64%	[7],[16]
Spread		6.00%	[8],[13]		6.00%	[8],[13]		6.00%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 15,775
Ending balance	[8],[13]	$ 17,794			17,794
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		168
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,000	[18]	3,000
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		3,000		3,000	3,000		3,000
Investment, Identifier [Axis]: Vistar Media, Inc., Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				2,180
Ending balance	[11]	$ 2,320			2,320
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14],[16]							12.63%
Spread	[14],[16]							7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 41,455
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[13],[65]	12.59%			12.59%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13],[65]	$ 5,372			$ 5,372
Investment, Identifier [Axis]: Vitesse Systems, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[13]	12.46%			12.46%
Spread	[11],[13]	7.00%			7.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 42,000			$ 42,000
Investment, Identifier [Axis]: Volusion, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(2,576)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		2,576
Gross Reductions					0		2,576
Ending balance		0		0	0		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,250		0
Gross Additions							0
Gross Reductions							0
Ending balance		7,000		0	7,000		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0
Gross Additions					0
Gross Reductions					0
Ending balance		0			0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							(706)
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions							11,446
Gross Reductions							706
Ending balance		0		10,740	0		10,740
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0
Amount of Unrealized Gain/(Loss)					1,867
Amount of Interest, Fees or Dividends Credited to Income					0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					7,250
Gross Additions					1,868
Gross Reductions					2,118
Ending balance		7,000			7,000
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0		$ 0	$ 0		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.00%			10.00%			10.00%
Amount of Realized Gain/(Loss)					$ 0
Amount of Unrealized Gain/(Loss)					0
Amount of Interest, Fees or Dividends Credited to Income					106
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,100
Gross Additions					0
Gross Reductions					0
Ending balance		$ 2,100			2,100
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.00%			10.00%
Amount of Realized Gain/(Loss)							$ 0
Amount of Unrealized Gain/(Loss)							0
Amount of Interest, Fees or Dividends Credited to Income							54
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							2,100
Gross Reductions							0
Ending balance				$ 2,100			2,100
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(3,188)
Amount of Unrealized Gain/(Loss)							1,821
Amount of Interest, Fees or Dividends Credited to Income							166
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							14,914
Gross Additions							0
Gross Reductions							14,914
Ending balance				0			0
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							(409)
Amount of Unrealized Gain/(Loss)							409
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							409
Gross Reductions							409
Ending balance				0			0
Investment, Identifier [Axis]: Volusion, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)							0
Amount of Unrealized Gain/(Loss)							2,576
Amount of Interest, Fees or Dividends Credited to Income							0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance							0
Gross Additions							0
Gross Reductions							0
Ending balance				0			0
Investment, Identifier [Axis]: Wall Street Prep, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				731
Ending balance	[11]	$ 880			$ 880
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.00%	[11],[12],[13]		7.00%	[11],[12],[13]		7.00%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ (4)
Ending balance	[11],[12],[13]	$ (3)			$ (3)
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.45%	[11],[13]		12.45%	[11],[13]		12.54%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 3,723
Ending balance	[11],[13]	$ 3,414			$ 3,414
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.73%	[11],[13]		11.73%	[11],[13]		11.50%	[14],[16],[56]
Spread		6.25%	[11],[13]		6.25%	[11],[13]		6.00%	[14],[16],[56]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[56]				$ 1,853
Ending balance	[11],[13]	$ 2,223			$ 2,223
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.73%	[11],[13]		11.73%	[11],[13]		11.50%	[14],[16]
Spread		6.25%	[11],[13]		6.25%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 386
Ending balance	[11],[13]	$ 384			$ 384
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.73%	[11],[13]		11.73%	[11],[13]		11.50%	[14],[16]
Spread		6.25%	[11],[13]		6.25%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 15,886
Ending balance	[11],[13]	$ 15,805			$ 15,805
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		11.73%	[11],[13]		11.73%	[11],[13]		11.50%	[14],[16]
Spread		6.25%	[11],[13]		6.25%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 12,707
Ending balance	[11],[13]	$ 12,642			12,642
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]				2,990
Ending balance	[11],[19]	$ 4,580			$ 4,580
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10.33%	[11],[13],[17]		10.33%	[11],[13],[17]		11.34%	[14],[16],[66]
Spread		5.00%	[11],[13],[17]		5.00%	[11],[13],[17]		6.00%	[14],[16],[66]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[66]				$ 2,405
Ending balance	[11],[13],[17]	$ 2,393			$ 2,393
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.33%	[11],[13]		10.33%	[11],[13]		11.35%	[14],[16]
Spread		5.00%	[11],[13]		5.00%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 10,658
Ending balance	[11],[13]	$ 10,604			$ 10,604
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.33%	[11],[13]		10.33%	[11],[13]		11.35%	[14],[16]
Spread		5.00%	[11],[13]		5.00%	[11],[13]		6.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 5,303
Ending balance	[11],[13]	$ 5,277			$ 5,277
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.56%	[11],[13]		13.56%	[11],[13]		12.64%	[14],[16],[67]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		7.00%	[14],[16],[67]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[67]				$ 2,222
Ending balance	[11],[13]	$ 655			$ 655
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.56%	[11],[13]		13.56%	[11],[13]		12.66%	[14],[16]
Spread		8.00%	[11],[13]		8.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 2,067
Ending balance	[11],[13]	$ 1,841			$ 1,841
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.56%	[11],[13]		12.56%	[11],[13]		12.66%	[14],[16]
Spread		7.00%	[11],[13]		7.00%	[11],[13]		7.00%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 9,300
Ending balance	[11],[13]	$ 7,112			$ 7,112
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[11],[13]	14.56%			14.56%
Spread	[11],[13]	9.00%			9.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 7,112			$ 7,112
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		139
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					3,845	[18]	3,845
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 3,845	[19]	$ 3,845	$ 3,845	[19]	$ 3,845
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.00%		13.00%	13.00%		13.00%	13.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					778		948
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					12,028		14,140
Gross Additions					12		14
Gross Reductions					0		0
Ending balance		$ 12,040		$ 14,154	$ 12,040		14,154
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.44%			11.44%
Spread		6.00%	[11],[13]		6.00%	[11],[13]		5.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]				$ 0
Ending balance	[11],[13]	$ 23,935			$ 23,935
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.43%	[11],[13]		11.43%	[11],[13]		11.22%	[14],[16]
Spread		6.00%	[11],[13]		6.00%	[11],[13]		5.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 24,057
Ending balance	[11],[13]	$ 37,635			37,635
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[16]							11.25%
Spread	[14],[16]							5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]				$ 37,828
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.92%	[8],[13]		12.92%	[8],[13]		13.00%	[7],[16]
Spread		7.50%	[8],[13]		7.50%	[8],[13]		7.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]				$ 10,220
Ending balance	[8],[13]	$ 10,290			$ 10,290
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (206)			$ (206)
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread	[11],[12],[13]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13]	$ (181)			$ (181)
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.26%			11.26%
Spread	[11],[13]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 6,496			$ 6,496
Investment, Identifier [Axis]: ZRG Partners, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[11],[13]	11.33%			11.33%
Spread	[11],[13]	6.00%			6.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13]	$ 46,564			$ 46,564
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		(170)
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0		240
Gross Additions					0		0
Gross Reductions					0		170
Ending balance		$ 0		$ 70	$ 0		$ 70
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.00%		12.00%	12.00%		12.00%	12.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					27		27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					450		450
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 450		$ 450	$ 450		$ 450
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		6.50%		6.50%	6.50%		6.50%	6.50%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					33		33
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					945		945
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 945		$ 945	$ 945		$ 945
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14.00%		14.00%	14.00%		14.00%	14.00%
Amount of Realized Gain/(Loss)					$ 0		$ 0
Amount of Unrealized Gain/(Loss)					(369)		(215)
Amount of Interest, Fees or Dividends Credited to Income					195		194
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					2,080		2,676
Gross Additions					0		0
Gross Reductions					370		215
Ending balance		$ 1,710		$ 2,461	1,710		2,461
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)					0		0
Amount of Unrealized Gain/(Loss)					0		0
Amount of Interest, Fees or Dividends Credited to Income					0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance					0	[9]	0
Gross Additions					0		0
Gross Reductions					0		0
Ending balance		$ 0	[10]	$ 0	$ 0	[10]	$ 0
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.69%	[11],[13]		12.69%	[11],[13]		12.71%	[14],[16],[68]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16],[68]
PIK Rate	[11],[13]	1.50%			1.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[68]				$ 16,380
Ending balance	[11],[13]	$ 16,633			$ 16,633
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.69%	[11],[13]		12.69%	[11],[13]		12.71%	[14],[16],[68]
Spread		7.25%	[11],[13]		7.25%	[11],[13]		7.25%	[14],[16],[68]
PIK Rate	[11],[13]	1.50%			1.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[68]				$ 4,067
Ending balance	[11],[13]	$ 4,164			$ 4,164
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. [2] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. [3] Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained. [4] Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained. [5] Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments. [6] Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments. [7] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. [8] Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. [9] Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit. [10] (27)Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit. [11] Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. [12] The position is unfunded and no interest income is being earned as of June 30, 2024. The position may earn a nominal unused facility fee on committed amounts. [13] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 93% of the loans (based on the par amount) contain Term SOFR (“SOFR”) floors which range between 0.50% and 5.25%, with a weighted-average floor of 1.24%. [14] Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. [15] The position is unfunded and no interest income is being earned as of December 31, 2023. The position may earn a nominal unused facility fee on committed amounts. [16] Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 96% of these floating rate loans (based on the par amount) contain LIBOR or SOFR floors which range between 0.50% and 2.00%, with a weighted-average floor of 1.20%. [17] Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of June 30, 2024. [18] Income producing through dividends or distributions. [19] Income producing through dividends or distributions. [20] RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of June 30, 2024. [21] Non-accrual and non-income producing debt investment. [22] Non-accrual and non-income producing debt investment. [23] Warrants are presented in equivalent shares/units with a strike price of $1.00 per share/unit. [24] (35)Warrants are presented in equivalent shares/units with a strike price of $1.00 per share/unit. [25] (33)Index based floating interest rate is subject to contractual maximum base rate of 3.00%. [26] Index based floating interest rate is subject to contractual maximum base rate of 3.00%. [27] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable. [28] Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable. [29] Shares/Units represent ownership in a related Real Estate or HoldCo entity. [30] (29)Shares/Units represent ownership in a related Real Estate or HoldCo entity. [31] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR plus 8.00% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate. [32] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+8.00% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate. [33] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. [34] Portfolio company headquarters are located outside of the United States. [35] Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. [36] Portfolio company headquarters are located outside of the United States. [37] Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated. [38] Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. [39] (30)Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated. [40] Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. [41] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 2.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [42] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [43] Effective yield as of December 31, 2023 was approximately 4.98% on the Dreyfus Government Cash Management. [44] (36)Effective yield as of June 30, 2024 was approximately 4.94% on the Dreyfus Government Cash Management. [45] (37)Effective yield as of June 30, 2024 was approximately 4.97% on the Fidelity Government Fund. [46] Effective yield as of December 31, 2023 was approximately 5.01% on the Fidelity Government Fund. [47] Effective yield as of December 31, 2023 was approximately 4.99% on the Fidelity Treasury. [48] (31)Effective yield as of June 30, 2024 was approximately 4.95% on the Fidelity Treasury. [49] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.50% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [50] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+5.75% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [51] Index based floating interest rate is subject to contractual maximum base rate of 1.50%. [52] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.50%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [53] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.75% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [54] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+8.00% (Floor 2.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [55] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+10.00%. RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [56] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [57] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [58] External Investment Manager. Investment is not encumbered as security for the Company’s Credit Facilities or in support of the SBA-guaranteed debentures issued by the Funds. [59] External Investment Manager. Investment is not encumbered as security for the Company's Credit Facilities or in support of the SBA-guaranteed debentures issued by the Funds. [60] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [61] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+5.75% (1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [62] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.50% (Floor 2.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [63] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of 11.75% per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate. [64] The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of 11.25% per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate. [65] RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. As of June 30, 2024, the facility had contracts running under the terms SOFR+7.00% (Floor 1.00%) and Prime+6.00% (Floor 2.00%). The rate presented represents a weighted-average rate for borrowings under the facility, as of June 30, 2024. [66] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+6.00% (0.75%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [67] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.00% (Floor 1.00%). RLOC facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023. [68] As of December 31, 2023, borrowings under the loan facility bore interest at SOFR+7.25% (Floor 1.00%). Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2023.