SEGMENT REPORTING - Schedule of Reconciliation of Total Segments to Income Loss Attributable to Oaktree Capital Group, LLC and Total Assets (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Equity-based compensation	$ 7,320		$ 7,498		$ 20,877		$ 27,482
Consolidated fund expenses	32,604		21,452		79,434		69,428
Non Operating Group Expenses	271		115		947		393
Ocgh Units Prior to Initial Public Offering in April 2012 [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Equity-based compensation	$ 6,250	[1]	$ 7,369	[1]	$ 18,231	[1]	$ 27,353	[1]

[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.