INVESTMENTS - Equity-method Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statements of Operations
Interest expense	$ (16,549)	$ (39,191)
Net realized and unrealized gain on investments	6,498	39,134
Net income	93,192	113,623
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statements of Operations
Revenues / investment income	1,176,631	840,605
Interest expense	(147,966)	(54,290)
Other expenses	(239,798)	(220,991)
Net realized and unrealized gain on investments	325,585	986,800
Net income	$ 1,114,452	$ 1,552,124
Maximum | Oaktree Funds
Schedule of Equity Method Investments [Line Items]
Ownership percentage	2.50%