VARIABLE INTEREST ENTITIES - Schedule of Non-Consolidated VIEs with Variable Interest (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Net assets of unconsolidated VIEs in which the Company has a variable interest	$ 12,613,891	$ 12,782,124
Maximum risk of loss as a result of the Company’s involvement with unconsolidated VIEs:
Unearned income and fees	38,993	37,468
Income and fees receivable	37,873	43,250
Investments	527,231	533,026
Unfunded commitments	182,846	207,575
Other commitments	23,021	0
Maximum Exposure to Loss	809,964	821,319
Employees and Executive Managing Directors
Maximum risk of loss as a result of the Company’s involvement with unconsolidated VIEs:
Unfunded commitments	$ 94,800	$ 97,500