REVENUES - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenues	$ 683,486	$ 513,340
Management Fees, Net
Disaggregation of Revenue [Line Items]
Revenues	604,186	447,898
Administrative, transaction and other fees
Disaggregation of Revenue [Line Items]
Revenues	72,988	63,397
Performance revenues
Disaggregation of Revenue [Line Items]
Revenues	6,312	2,045
Credit Platform
Disaggregation of Revenue [Line Items]
Revenues	408,940	318,397
Credit Platform \| Management Fees, Net
Disaggregation of Revenue [Line Items]
Revenues	354,374	270,801
Credit Platform \| Direct lending
Disaggregation of Revenue [Line Items]
Revenues	299,089	258,076
Credit Platform \| Alternative credit
Disaggregation of Revenue [Line Items]
Revenues	21,185	0
Credit Platform \| Investment grade credit
Disaggregation of Revenue [Line Items]
Revenues	16,687	0
Credit Platform \| Liquid credit
Disaggregation of Revenue [Line Items]
Revenues	7,480	6,799
Credit Platform \| Other
Disaggregation of Revenue [Line Items]
Revenues	9,933	5,926
Credit Platform \| Administrative, transaction and other fees
Disaggregation of Revenue [Line Items]
Revenues	51,610	47,421
Credit Platform \| Performance revenues
Disaggregation of Revenue [Line Items]
Revenues	2,956	175
GP Strategic Capital Platform
Disaggregation of Revenue [Line Items]
Revenues	151,234	146,563
GP Strategic Capital Platform \| Management Fees, Net
Disaggregation of Revenue [Line Items]
Revenues	140,362	135,763
GP Strategic Capital Platform \| GP minority stakes
Disaggregation of Revenue [Line Items]
Revenues	148,443	139,786
GP Strategic Capital Platform \| GP debt financing
Disaggregation of Revenue [Line Items]
Revenues	2,392	5,405
GP Strategic Capital Platform \| Professional sports minority stakes
Disaggregation of Revenue [Line Items]
Revenues	643	1,232
GP Strategic Capital Platform \| Strategic Revenue-Share Purchase consideration amortization
Disaggregation of Revenue [Line Items]
Revenues	(11,116)	(10,660)
GP Strategic Capital Platform \| Administrative, transaction and other fees
Disaggregation of Revenue [Line Items]
Revenues	10,872	10,800
Real Assets Platform
Disaggregation of Revenue [Line Items]
Revenues	123,312	48,380
Real Assets Platform \| Management Fees, Net
Disaggregation of Revenue [Line Items]
Revenues	109,450	41,334
Real Assets Platform \| Net lease
Disaggregation of Revenue [Line Items]
Revenues	46,836	41,334
Real Assets Platform \| Real estate credit
Disaggregation of Revenue [Line Items]
Revenues	10,381	0
Real Assets Platform \| Digital Infrastructure
Disaggregation of Revenue [Line Items]
Revenues	52,233	0
Real Assets Platform \| Administrative, transaction and other fees
Disaggregation of Revenue [Line Items]
Revenues	10,506	5,176
Real Assets Platform \| Performance revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 3,356	$ 1,870