DERIVATIVES AND HEDGING - Impact of Derivatives Held by the Consolidated Fund on the Consolidated Statements of Operations (Details) - Consolidated Funds - Not Designated as Hedging Instrument - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	$ 3,590	$ (11,439)	$ (6,546)
Net Change in Unrealized Appreciation (Depreciation) on Investments	1,581	(23,994)	4,364
Foreign-currency forward contracts
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	6,232	(11,184)	(6,546)
Net Change in Unrealized Appreciation (Depreciation) on Investments	4,477	(23,813)	4,364
Total-return and interest-rate and credit default swaps
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	(92)	(148)	0
Net Change in Unrealized Appreciation (Depreciation) on Investments	(57)	(69)	0
Options and futures
Derivatives, Fair Value [Line Items]
Net Realized Gain (Loss) on Investments	(2,550)	(107)	0
Net Change in Unrealized Appreciation (Depreciation) on Investments	$ (3,697)	$ (112)	$ 0