INVESTMENTS - Schedule of Net Gains (Losses) from Investment Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	$ 52,275	$ 65,644	$ 79,420
Net Change in Unrealized Appreciation (Depreciation) on Investments	(31,455)	150,666	29,064
Consolidated Funds \| Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	52,275	65,644	79,420
Net Change in Unrealized Appreciation (Depreciation) on Investments	(31,455)	150,666	29,064
Consolidated Funds \| Investments and other financial instruments \| Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	45,322	54,580	63,213
Net Change in Unrealized Appreciation (Depreciation) on Investments	13,824	131,725	27,890
Consolidated Funds \| CLO liabilities \| Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	0	185	0
Net Change in Unrealized Appreciation (Depreciation) on Investments	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	2,481	337	898
Net Change in Unrealized Appreciation (Depreciation) on Investments	(48,297)	28,193	(14,909)
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	403	613	(235)
Net Change in Unrealized Appreciation (Depreciation) on Investments	811	(19)	328
Consolidated Funds \| Options and futures \| Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	2,187	1,440	4,382
Net Change in Unrealized Appreciation (Depreciation) on Investments	2,207	(2,176)	(569)
Consolidated Funds \| Commodity swaps \| Not Designated as Hedging Instrument
Gain (Loss) on Securities [Line Items]
Net Realized Gain (Loss) on Investments	1,882	8,489	11,162
Net Change in Unrealized Appreciation (Depreciation) on Investments	$ 0	$ (8,654)	$ 16,324