BORROWINGS - Components of Interest Expense - Notes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Instrument [Line Items]
Amortization of deferred financing costs and debt issuance costs			$ 588	$ 504
Interest and credit facility fees paid during the period			33,954	15,442
Secured debt | 2015-1R Notes
Debt Instrument [Line Items]
Interest expense	$ 7,986	$ 3,418	15,341	6,037
Amortization of deferred financing costs and debt issuance costs	62	61	124	123
Total interest expense and credit facility fees	8,048	3,479	15,465	6,160
Interest and credit facility fees paid during the period	$ 7,498	$ 2,592	$ 14,384	$ 5,265