SEGMENT REPORTING - Reconciliation of Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Adjustments:
Equity compensation expense	$ 69,252	$ 53,650
Consolidated Funds
Adjustments:
Income before taxes of non-controlling interests in Consolidated Funds, net of eliminations	26,693	47,382
Total investment income—realized	(222,938)	(120,290)
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income before taxes	241,122	161,309
Adjustments:
Depreciation and amortization expense	45,659	38,126
Equity compensation expense	68,704	53,017
Acquisition-related compensation expense	642	48,001
Acquisition and merger-related expense	4,955	9,042
Placement fee adjustment	(3,232)	(693)
Other expense, net	91	1,981
Total performance income—unrealized	(127,713)	(133,532)
Total performance related compensation—unrealized	85,150	91,198
Investment (income) loss—unrealized	(28,777)	1,822
Realized income	380,909	313,043
Total performance income—realized	(31,136)	(43,868)
Total performance related compensation—realized	23,859	28,575
Total investment income—realized	7,504	(1,505)
Fee related earnings	381,136	296,245
Operating segment | Consolidated Funds
Adjustments:
Income before taxes of non-controlling interests in Consolidated Funds, net of eliminations	(27,171)	(47,407)
Operating segment | Subsidiaries
Adjustments:
Income before taxes of non-controlling interests in Consolidated Funds, net of eliminations	(5,671)	(4,989)
OMG
Adjustments:
OMG expense, net	127,150	95,168
Realized income	126,617	91,026
Total performance income—realized	0	0
Total performance related compensation—realized	0	0
Total investment income—realized	118	451
Fee related earnings	$ 126,499	$ 90,575