Quarterly report pursuant to Section 13 or 15(d)

DEBT - SBIC Debentures (Details)

v3.22.2.2
DEBT - SBIC Debentures (Details) - USD ($)
9 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Payable $ 2,046,000,000 $ 1,805,000,000
Recorded value 2,038,384,000 $ 1,796,056,000
Unsecured Notes    
Debt Instrument [Line Items]    
Debt instrument, weighted-average annual interest rate   2.90%
SBIC Debentures | Unsecured Notes    
Debt Instrument [Line Items]    
Face amount 350,000,000 $ 350,000,000
Payable $ 350,000,000 350,000,000
Debt instrument, term 10 years  
Debt instrument, weighted-average annual interest rate 2.90%  
Debt instrument, remaining term 5 years 4 months 24 days  
Recorded value $ 343,618,000 $ 342,731,000
SBIC Debentures | Unsecured Notes | MSMF    
Debt Instrument [Line Items]    
Face amount 175,000,000  
Recorded value 171,900,000  
Unamortized debt issuance costs 3,100,000  
SBIC Debentures | Unsecured Notes | MSC III    
Debt Instrument [Line Items]    
Face amount 175,000,000  
Recorded value 171,700,000  
Unamortized debt issuance costs $ 3,300,000