SEGMENT REPORTING - Schedule of Reconciliation of Total Segments to Income Loss Attributable to Oaktree Capital Group, LLC and Total Assets (Additional Information) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Equity-based compensation	$ 14,726	$ 16,083	$ 28,622	$ 27,789
Consolidated fund expenses	1,635	54,920	2,676	72,430
Expenses incurred by Intermediate Holding Companies	241	652	536	987
Corporate investments	1,036,238	176,678	1,036,238	176,678	$ 213,988
Investment Management
Segment Reporting, Asset Reconciling Item [Line Items]
Equity-based compensation	12,445	11,901	23,148	18,924
Placement costs		2,800		3,700
Corporate investments	1,400,000		1,400,000
Investment Management | Equity Method Investments
Segment Reporting, Asset Reconciling Item [Line Items]
Equity method investments	1,100,000	1,300,000	1,100,000	1,300,000
Adjustments
Segment Reporting, Asset Reconciling Item [Line Items]
Foreign currency hedging gains (losses)	27	4,639	689	6,684
Investment income	3,149		13,578
Incentive income compensation	54	5,657	39,888	17,553
Acquisition-related items	1,889	1,695	1,498	3,502
Reimbursable expenses	5,545	5,513	11,346	11,103
Gain on foreign currency	(1,530)	663	(1,395)	1,550
Share-based compensation accounted for as liability awards	540	173	593	261
Placement costs	1,210		7,914
Foreign-currency hedging	5,168	(5,369)	10,237	(13,613)
Other expenses		16		55
OCGH Units Prior to Initial Public Offering in April 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Equity-based compensation	$ 2,821	$ 4,010	$ 6,066	$ 8,605