UNITHOLDERS' CAPITAL - Changes in Company Ownership Interest (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unitholders' Capital [Abstract]
Net income (loss) attributable to Oaktree Capital Group, LLC	$ 64,907	$ 42,948	$ 56,577	$ 57,566	$ 39,271	$ 25,212	$ 24,719	$ 18,608	$ 221,998	$ 107,810	$ (95,972)
Equity reallocation between controlling and non-controlling interests									79,052	69,097	(6,413)
Change from net income (loss) attributable to Oaktree Capital Group, LLC and transfers from (to) non-controlling interest									$ 301,050	$ 176,907	$ (102,385)