Quarterly report pursuant to Section 13 or 15(d)

DEBT - Schedule of Debt (Details)

v3.23.2
DEBT - Schedule of Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Outstanding Balance $ 2,030,000 $ 2,007,000
Unamortized Debt Issuance (Costs)/ Premiums (8,498) (7,898)
Recorded Value 2,021,502 1,999,102
Estimated Fair Value 1,907,432 1,882,810
July 2026 Notes | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 500,000 500,000
Unamortized Debt Issuance (Costs)/ Premiums (1,601) (1,864)
Recorded Value 498,399 498,136
Estimated Fair Value 440,345 434,250
May 2024 Notes | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 450,000 450,000
Unamortized Debt Issuance (Costs)/ Premiums 454 727
Recorded Value 450,454 450,727
Estimated Fair Value 442,926 444,749
SBIC Debentures | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 350,000 350,000
Unamortized Debt Issuance (Costs)/ Premiums (6,057) (6,086)
Recorded Value 343,943 343,914
Estimated Fair Value 290,232 290,204
December 2025 Notes | Unsecured Notes    
Debt Instrument [Line Items]    
Outstanding Balance 150,000 100,000
Unamortized Debt Issuance (Costs)/ Premiums (1,294) (675)
Recorded Value 148,706 99,325
Estimated Fair Value 153,929 106,607
Credit Facility | Line of Credit    
Debt Instrument [Line Items]    
Recorded Value 580,000 607,000
Credit Facility | Corporate Facility | Line of Credit    
Debt Instrument [Line Items]    
Outstanding Balance 410,000 407,000
Unamortized Debt Issuance (Costs)/ Premiums 0 0
Recorded Value 410,000 407,000
Estimated Fair Value 410,000 407,000
Credit Facility | SPV Facility | Line of Credit    
Debt Instrument [Line Items]    
Outstanding Balance 170,000 200,000
Unamortized Debt Issuance (Costs)/ Premiums 0 0
Recorded Value 170,000 200,000
Estimated Fair Value $ 170,000 $ 200,000