Quarterly report pursuant to Section 13 or 15(d)

DEBT - Schedule of Debt (Details)

v3.23.3
DEBT - Schedule of Debt (Details) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Outstanding Balance $ 1,943,000,000 $ 2,007,000,000
Unamortized Debt Issuance (Costs)/ Premiums (8,078,000) (7,898,000)
Recorded Value 1,934,922,000 1,999,102,000
Estimated Fair Value 1,815,720,000 1,882,810,000
July 2026 Notes | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 500,000,000 500,000,000
Unamortized Debt Issuance (Costs)/ Premiums (1,470,000) (1,864,000)
Recorded Value 498,530,000 498,136,000
Estimated Fair Value 442,405,000 434,250,000
May 2024 Notes | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 450,000,000 450,000,000
Unamortized Debt Issuance (Costs)/ Premiums 318,000 727,000
Recorded Value 450,318,000 450,727,000
Estimated Fair Value 445,406,000 444,749,000
SBIC Debentures | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 350,000,000 350,000,000
Unamortized Debt Issuance (Costs)/ Premiums (5,761,000) (6,086,000)
Recorded Value 344,239,000 343,914,000
Estimated Fair Value 284,128,000 290,204,000
December 2025 Notes | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 150,000,000 100,000,000
Unamortized Debt Issuance (Costs)/ Premiums (1,165,000) (675,000)
Recorded Value 148,835,000 99,325,000
Estimated Fair Value 150,781,000 106,607,000
Credit Facility | Line of Credit    
Debt Instrument [Line Items]    
Recorded Value 493,000,000 607,000,000
Credit Facility | Corporate Facility | Line of Credit    
Debt Instrument [Line Items]    
Outstanding Balance 323,000,000 407,000,000
Unamortized Debt Issuance (Costs)/ Premiums 0 0
Recorded Value 323,000,000 407,000,000
Estimated Fair Value 323,000,000 407,000,000
Credit Facility | SPV Facility | Line of Credit    
Debt Instrument [Line Items]    
Outstanding Balance 170,000,000 200,000,000
Unamortized Debt Issuance (Costs)/ Premiums 0 0
Recorded Value 170,000,000 200,000,000
Estimated Fair Value $ 170,000,000 $ 200,000,000