REVENUES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 1,369,722	$ 823,878	$ 249,815
Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	751,978	570,997	249,815
GP Capital Solutions Products
Disaggregation of Revenue [Line Items]
Revenues	518,438	252,881	0
Real Estate Products
Disaggregation of Revenue [Line Items]
Revenues	99,306	0	0
Management Fees, Net
Disaggregation of Revenue [Line Items]
Revenues	1,211,606	667,935	194,906
Management Fees, Net | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	639,975	433,630	194,906
Management Fees, Net | GP Capital Solutions Products
Disaggregation of Revenue [Line Items]
Revenues	491,452	234,305	0
Management Fees, Net | Real Estate Products
Disaggregation of Revenue [Line Items]
Revenues	80,179	0	0
Diversified lending | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	480,874	348,363	140,153
Technology lending | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	114,876	66,089	42,052
First lien lending | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	16,029	15,185	12,335
Opportunistic lending | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	8,756	3,993	366
CLOs | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	19,440	0	0
GP minority equity investments | GP Capital Solutions Products
Disaggregation of Revenue [Line Items]
Revenues	513,613	233,505	0
GP debt financing | GP Capital Solutions Products
Disaggregation of Revenue [Line Items]
Revenues	13,611	10,215	0
Professional sports minority investments | GP Capital Solutions Products
Disaggregation of Revenue [Line Items]
Revenues	1,611	477	0
Strategic Revenue-Share Purchase consideration amortization | GP Capital Solutions Products
Disaggregation of Revenue [Line Items]
Revenues	(37,383)	(9,892)	0
Net lease | Real Estate Products
Disaggregation of Revenue [Line Items]
Revenues	80,179	0	0
Administrative, transaction and other fees
Disaggregation of Revenue [Line Items]
Revenues	145,895	150,037	54,909
Administrative, transaction and other fees | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	112,003	131,461	54,909
Administrative, transaction and other fees | GP Capital Solutions Products
Disaggregation of Revenue [Line Items]
Revenues	26,986	18,576	0
Administrative, transaction and other fees | Real Estate Products
Disaggregation of Revenue [Line Items]
Revenues	6,906	0	0
Realized performance income
Disaggregation of Revenue [Line Items]
Revenues	12,221	5,906	0
Realized performance income | Direct Lending Products
Disaggregation of Revenue [Line Items]
Revenues	0	5,906	0
Realized performance income | Real Estate Products
Disaggregation of Revenue [Line Items]
Revenues	$ 12,221	$ 0	$ 0