DERIVATIVES AND HEDGING - Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivative Assets:
Derivative assets, at fair value	$ 3,580	$ 16,499
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets	3,245	7,950
Cash Collateral Received (Pledged)	0	0
Net Amount	335	8,549
Derivative Liabilities:
Derivative liabilities	(13,668)	(8,951)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(3,245)	(7,950)
Cash Collateral Pledged	(11)	(941)
Net Amount	(10,412)	(60)
Oaktree Capital Group Excluding Consolidated Funds
Derivative Liabilities:
Derivative liabilities		(7,865)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities		(7,805)
Cash Collateral Pledged		0
Net Amount		(60)
Oaktree Capital Group Excluding Consolidated Funds | Foreign-currency forward contracts
Derivative Assets:
Derivative assets, at fair value	3,102	16,142
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets	3,102	7,805
Cash Collateral Received (Pledged)	0	0
Net Amount	0	8,337
Derivative Liabilities:
Derivative liabilities	(12,896)	(7,805)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(3,102)	(7,805)
Cash Collateral Pledged	0	0
Net Amount	(9,794)	0
Oaktree Capital Group Excluding Consolidated Funds | Interest-rate swaps
Derivative Liabilities:
Derivative liabilities		(60)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities
Cash Collateral Pledged		0
Net Amount		(60)
Consolidated Funds
Derivative Assets:
Derivative assets, at fair value	478	357
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets	143	145
Cash Collateral Received (Pledged)	0	0
Net Amount	335	212
Derivative Liabilities:
Derivative liabilities	(772)	(1,086)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(143)	(145)
Cash Collateral Pledged	(11)	(941)
Net Amount	(618)	0
Consolidated Funds | Foreign-currency forward contracts
Derivative Assets:
Derivative assets, at fair value	117	216
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets	117	4
Cash Collateral Received (Pledged)	0	0
Net Amount	0	212
Derivative Liabilities:
Derivative liabilities	(735)	(4)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(117)	(4)
Cash Collateral Pledged	0	0
Net Amount	(618)	0
Consolidated Funds | Total-return and interest-rate swaps
Derivative Assets:
Derivative assets, at fair value	361	141
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Assets	26	141
Cash Collateral Received (Pledged)	0	0
Net Amount	335	0
Derivative Liabilities:
Derivative liabilities	(37)	(1,082)
Gross Amounts Not Offset in Statements of Financial Condition
Derivative Liabilities	(26)	(141)
Cash Collateral Pledged	(11)	(941)
Net Amount	$ 0	$ 0