INVESTMENTS - Investment Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Schedule of Equity Method Investments [Line Items]
Other investments, at fair value	$ 25,603	$ (1,866)
Total investment income	51,722	11,741
Funds
Schedule of Equity Method Investments [Line Items]
Equity-method investments:	26,122	14,253
Companies
Schedule of Equity Method Investments [Line Items]
Equity-method investments:	$ (3)	$ (646)