SEGMENT REPORTING - Reconciliation of Net Income (Loss) Attributable to Oaktree Capital Group, LLC to Adjusted Net Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Segment Reporting Information [Line Items]
Net income (loss) attributable to Oaktree Capital Group, LLC	$ 57,566		$ 18,608
Equity-based compensation	6,452		12,189	[1]
Income taxes	10,157	[2]	7,767	[2]
Non-Operating Group expenses	210	[3]	178	[3]
Net income attributable to OCGH non-controlling interest in consolidated subsidiaries	262,017	[3]	134,890	[3]
Adjusted net income	335,750		173,632
Ocgh Units Prior to Initial Public Offering in April 2012 [Member]
Segment Reporting Information [Line Items]
Equity-based compensation	$ 5,800

[1] This adjustment adds back the effect of equity-based compensation charges related to unit grants made before the Company’s initial public offering, which is excluded from adjusted net income because it is a non-cash charge that does not affect the Company's financial position.

[2] Because adjusted net income is a pre-tax measure, this adjustment eliminates the effect of income tax expense.

[3] Because adjusted net income is calculated at the Operating Group level, this adjustment adds back the effect of items applicable to OCG, its Intermediate Holding Companies or the OCGH non-controlling interest.