SEGMENT REPORTING - Schedule of Reconciliation of Total Segments to Income Loss Attributable to Oaktree Capital Group, LLC and Total Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Management fees	$ 190,974	$ 47,106	$ 584,542	$ 148,848
Incentive income	99,256	3,385	242,894	3,949
Investment Income	65,758	10,342	136,205	38,718
Total expenses	(202,339)	(190,518)	(579,171)	(672,421)
Interest expense, net	(32,414)	(56,023)	(86,849)	(155,334)
Other income (expense), net	543	6,368	11,892	13,925
Other income (loss) of Consolidated Funds	55,612	(1,585,338)	113,130	(162,622)
Income taxes	(8,567)	(1,893)	(29,818)	(15,253)
Net income attributable to Oaktree Capital Group, LLC	58,297	1,887	135,422	59,954
Total assets	7,099,376	54,814,797	7,099,376	54,814,797	$ 51,762,731
Investment Management
Segment Reporting, Asset Reconciling Item [Line Items]
Management fees	194,349	185,766	593,069	566,058
Incentive income	99,731	16,925	283,966	230,952
Total expenses	(190,167)	(147,090)	(570,203)	(563,216)
Interest expense, net	(7,799)	(8,388)	(24,458)	(26,103)
Other income (expense), net	(4,902)	(283)	(6,294)	(2,279)
Corporate investments	1,400,000		1,400,000
Consolidated Funds
Segment Reporting, Asset Reconciling Item [Line Items]
Net (income) loss attributable to non-controlling interests	(13,243)	1,779,225	(15,618)	1,034,521
Consolidated Subsidiaries
Segment Reporting, Asset Reconciling Item [Line Items]
Net (income) loss attributable to non-controlling interests	(97,283)	(10,767)	(241,785)	(174,377)
Oaktree Capital Group Excluding Consolidated Funds
Segment Reporting, Asset Reconciling Item [Line Items]
Corporate investments	1,040,994	173,574	1,040,994	173,574	$ 213,988
Segment | Investment Management
Segment Reporting, Asset Reconciling Item [Line Items]
Management fees	194,349	185,766	593,069	566,058
Incentive income	99,731	16,925	283,966	230,952
Investment Income	70,928	(19,950)	133,730	56,873
Total expenses	(190,167)	(147,090)	(570,203)	(563,216)
Interest expense, net	(7,799)	(8,388)	(24,458)	(26,103)
Other income (expense), net	(4,902)	(283)	(6,294)	(2,279)
Other income (loss) of Consolidated Funds	0	0	0	0
Income taxes	0	0	0	0
Net income attributable to Oaktree Capital Group, LLC	162,140	26,980	409,810	262,285
Total assets	3,302,911	3,229,121	3,302,911	3,229,121
Segment | Consolidated Funds | Investment Management
Segment Reporting, Asset Reconciling Item [Line Items]
Net (income) loss attributable to non-controlling interests	0	0	0	0
Segment | Consolidated Subsidiaries | Investment Management
Segment Reporting, Asset Reconciling Item [Line Items]
Net (income) loss attributable to non-controlling interests	0	0	0	0
Segment | Oaktree Capital Group Excluding Consolidated Funds | Investment Management
Segment Reporting, Asset Reconciling Item [Line Items]
Corporate investments	1,383,612	1,465,195	1,383,612	1,465,195
Adjustments
Segment Reporting, Asset Reconciling Item [Line Items]
Management fees	(3,375)	(138,660)	(8,527)	(417,210)
Incentive income	(475)	(13,540)	(41,072)	(227,003)
Investment Income	(5,170)	30,292	2,475	(18,155)
Total expenses	(12,172)	(43,428)	(8,968)	(109,205)
Interest expense, net	(24,615)	(47,635)	(62,391)	(129,231)
Other income (expense), net	5,445	6,651	18,186	16,204
Other income (loss) of Consolidated Funds	55,612	(1,585,338)	113,130	(162,622)
Income taxes	(8,567)	(1,893)	(29,818)	(15,253)
Net income attributable to Oaktree Capital Group, LLC	(103,843)	(25,093)	(274,388)	(202,331)
Total assets	3,796,465	51,585,676	3,796,465	51,585,676
Adjustments | Consolidated Funds
Segment Reporting, Asset Reconciling Item [Line Items]
Net (income) loss attributable to non-controlling interests	(13,243)	1,779,225	(15,618)	1,034,521
Adjustments | Consolidated Subsidiaries
Segment Reporting, Asset Reconciling Item [Line Items]
Net (income) loss attributable to non-controlling interests	(97,283)	(10,767)	(241,785)	(174,377)
Adjustments | Oaktree Capital Group Excluding Consolidated Funds
Segment Reporting, Asset Reconciling Item [Line Items]
Corporate investments	$ (342,618)	$ (1,291,621)	$ (342,618)	$ (1,291,621)