DEBT OBLIGATIONS, NET - Collateralized Loan Obligation Debt (Details) $ in Thousands		Dec. 02, 2021 USD ($) security	Jul. 13, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Debt obligations, net	[1]			$ 3,783,946	$ 4,245,697
Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Debt obligations, net				1,060,719	1,058,462
Variable Interest Entity, Primary Beneficiary | Collateralized Loan Obligation
Debt Instrument [Line Items]
Subordinate and controlling interest		15.60%	18.00%
Number of additional tranches | security		2
Subordinate and controlling interest as investment		6.80%
Non-Recourse Notes | CLO Debt
Debt Instrument [Line Items]
Debt obligations, net		$ 566,200	$ 498,200
Loans financed		$ 729,400	$ 607,500
Advance rate		77.60%	82.00%
CLO Debt
Debt Instrument [Line Items]
Unamortized debt issuance costs				2,100
Various Date | CLO Debt
Debt Instrument [Line Items]
Debt obligations, net				1,100,000
Unamortized debt issuance costs				$ 2,100	$ 5,900

[1] Includes amounts relating to consolidated variable interest entities. Refer to Note 2 and Note 9.