DERIVATIVES AND HEDGING - Impact of Derivatives Held by Consolidated Funds on Income (Details) - Not Designated as Hedging Instrument - Consolidated Funds - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	$ 3,493	$ 6,772	$ 4,914	$ 9,717
Net Change in Unrealized Appreciation (Depreciation) on Investments	(6,809)	9,917	3,967	(17,147)
Foreign-currency forward contracts
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	93	14,133	(1,521)	15,089
Net Change in Unrealized Appreciation (Depreciation) on Investments	(6,596)	9,494	(10,580)	12,422
Total-return and interest-rate and credit default swaps
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	122	4,266	117	282
Net Change in Unrealized Appreciation (Depreciation) on Investments	468	32,939	456	106
Options and futures
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	640	4,108	1,072	10,081
Net Change in Unrealized Appreciation (Depreciation) on Investments	1,134	(2,088)	736	(105)
Commodity swaps
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	2,638	(15,735)	5,246	(15,735)
Net Change in Unrealized Appreciation (Depreciation) on Investments	$ (1,815)	$ (30,428)	$ 13,355	$ (29,570)