DERIVATIVES AND HEDGING DERIVATIVES AND HEDGING - Fair Value of Derivatives (Details) - Not Designated as Hedging Instrument - Oaktree Capital Group Excluding Consolidated Funds - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Notional	$ 0	$ 300,704
Fair Value	0	4,038
Liabilities
Notional	(156,281)	(77,156)
Fair Value	(1,703)	(2,318)
Foreign-currency forward contracts
Assets
Notional	0	58,254
Fair Value	0	1,654
Liabilities
Notional	(156,281)	(77,156)
Fair Value	$ (1,703)	(2,318)
Cross-currency swap
Assets
Notional		242,450
Fair Value		2,384
Liabilities
Notional		0
Fair Value		$ 0