INVESTMENTS - Net Gains (Losses) from Investment Activities of Consolidated Funds (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	$ 54,857	$ 30,701	$ 3,081	$ 62,381
Net Change in Unrealized Appreciation (Depreciation) on Investments	(22,295)	(12,789)	95,179	(37,971)
Consolidated Funds | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	54,857	30,701	3,081	62,381
Net Change in Unrealized Appreciation (Depreciation) on Investments	(22,295)	(12,789)	95,179	(37,971)
Consolidated Funds | Investments and other financial instruments | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	51,888	27,208	(3,859)	57,467
Net Change in Unrealized Appreciation (Depreciation) on Investments	(20,790)	(5,980)	90,923	(41,938)
Consolidated Funds | CLO liabilities | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	150	0	185	0
Net Change in Unrealized Appreciation (Depreciation) on Investments	235	0	1,597	0
Consolidated Funds | Foreign-currency forward contracts | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	116	93	(235)	(1,521)
Net Change in Unrealized Appreciation (Depreciation) on Investments	177	(6,596)	5,912	(10,580)
Consolidated Funds | Total-return and interest-rate and credit default swaps | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	0	122
Net Change in Unrealized Appreciation (Depreciation) on Investments	2,955	468
Consolidated Funds | Total-return and interest-rate swaps | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments			0	117
Net Change in Unrealized Appreciation (Depreciation) on Investments			3,588	456
Consolidated Funds | Options and futures | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	(32)	640	(238)	1,072
Net Change in Unrealized Appreciation (Depreciation) on Investments	1,988	1,134	1,600	736
Consolidated Funds | Commodity swaps | Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	2,735	2,638	7,228	5,246
Net Change in Unrealized Appreciation (Depreciation) on Investments	$ (6,860)	$ (1,815)	$ (8,441)	$ 13,355