DERIVATIVES AND HEDGING - Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Derivative Assets:
Derivative assets		$ 6,502
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets		1,497
Cash Collateral Received		0
Net Amount		5,005
Derivative Liabilities:
Derivative liabilities	$ (5,873)	(2,961)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(892)	(1,497)
Cash Collateral Pledged	0	0
Net Amount	(4,981)	(1,464)
Consolidated Funds
Derivative Assets:
Derivative assets		2,464
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets		0
Cash Collateral Received		0
Net Amount		2,464
Consolidated Funds | Foreign-currency forward contracts
Derivative Assets:
Derivative assets	3,350	2,275
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets	0	0
Cash Collateral Received	0	0
Net Amount	3,350	2,275
Derivative Liabilities:
Derivative liabilities	(1,157)	(643)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	0	0
Cash Collateral Pledged	0	0
Net Amount	(1,157)	(643)
Consolidated Funds | Options and futures
Derivative Assets:
Derivative assets		189
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets		0
Cash Collateral Received		0
Net Amount		189
Oaktree Capital Group Excluding Consolidated Funds
Derivative Assets:
Derivative assets		4,038
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets		1,497
Cash Collateral Received		0
Net Amount		2,541
Derivative Liabilities:
Derivative liabilities	(4,716)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(892)
Cash Collateral Pledged	0
Net Amount	(3,824)
Oaktree Capital Group Excluding Consolidated Funds | Foreign-currency forward contracts
Derivative Assets:
Derivative assets	1,148	1,654
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets	892	1,497
Cash Collateral Received	0	0
Net Amount	256	157
Derivative Liabilities:
Derivative liabilities	(2,519)	(2,318)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(892)	(1,497)
Cash Collateral Pledged	0	0
Net Amount	(1,627)	(821)
Oaktree Capital Group Excluding Consolidated Funds | Cross-currency swap
Derivative Assets:
Derivative assets		2,384
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets		0
Cash Collateral Received		0
Net Amount		$ 2,384
Derivative Liabilities:
Derivative liabilities	(2,197)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	0
Cash Collateral Pledged	0
Net Amount	$ (2,197)