SEGMENT REPORTING - Reconciliation of Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Consolidated Funds
Adjustments:
(Income) loss before taxes of non-controlling interests in Consolidated Funds, net of eliminations	$ 67,681	$ (15,022)	$ 94,374	$ 32,360
Total investment (income) loss—realized	(234,454)	(117,375)	(457,392)	(237,665)
Operating segment
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income before taxes	381,969	67,066	623,091	228,375
Adjustments:
Depreciation and amortization expense	42,991	40,330	88,650	78,456
Equity compensation expense	62,284	50,144	130,988	103,161
Acquisition-related compensation expense	600	59,491	1,242	107,492
Acquisition and merger-related expense	2,757	1,152	7,712	10,194
Placement fee adjustment	(3,744)	(1,425)	(6,976)	(2,118)
Other expense, net	212	12	303	1,993
Total performance (income) loss—unrealized	(288,220)	24,149	(415,933)	(109,383)
Total performance related compensation—unrealized	215,496	(8,549)	300,646	82,649
Investment (income) loss—unrealized	(39,629)	(3,945)	(68,406)	(2,123)
Realized income	439,523	348,687	820,432	661,730
Total performance income—realized	(140,635)	(70,094)	(171,771)	(113,962)
Total performance related compensation—realized	99,109	44,058	122,968	72,633
Total investment (income) loss—realized	(4,221)	(2,604)	3,283	(4,109)
Fee related earnings	393,776	320,047	774,912	616,292
Operating segment | Consolidated Funds
Adjustments:
(Income) loss before taxes of non-controlling interests in Consolidated Funds, net of eliminations	(67,762)	14,999	(94,933)	(32,408)
Operating segment | Subsidiaries
Adjustments:
(Income) loss before taxes of non-controlling interests in Consolidated Funds, net of eliminations	3,786	4,022	(1,885)	(967)
OMG
Adjustments:
OMG expense, net	128,783	101,241	255,933	196,409
Realized income	127,313	101,442	253,930	192,468
Total performance income—realized	0	0	0	0
Total performance related compensation—realized	0	0	0	0
Total investment (income) loss—realized	(317)	1,174	(199)	1,625
Fee related earnings	$ 127,630	$ 100,268	$ 254,129	$ 190,843