DERIVATIVES AND HEDGING - Fair Value of Derivatives of Consolidated Funds (Details) - Not Designated as Hedging Instrument - Consolidated Funds - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets
Notional	$ 754,972	$ 817,787
Fair Value	9,116	10,737
Liabilities
Notional	(118,832)	(180,996)
Fair Value	(21,242)	(24,022)
Foreign-currency forward contracts
Assets
Notional	513,197	427,141
Fair Value	2,189	9,758
Liabilities
Notional	(71,676)	(52,531)
Fair Value	(19,486)	(16,356)
Total-return and interest-rate and credit default swaps
Assets
Notional	80,441	12,604
Fair Value	6,130	700
Liabilities
Notional	(42,665)	(3,182)
Fair Value	(328)	(7,666)
Options and futures
Assets
Notional	161,334	378,042
Fair Value	797	279
Liabilities
Notional	(4,491)	(125,283)
Fair Value	$ (1,428)	$ 0