UNITHOLDERS' CAPITAL - Summary of Net Income (Loss) (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
Weighted average Oaktree Operating Group units outstanding (in thousands):
Class A units outstanding (in shares)									34,979		28,170		22,677
Oaktree Operating Group net income (loss):
Oaktree Operating Group net income (loss):	$ 1,693,123	$ 1,089,231	$ 1,044,830	$ 2,383,548	$ 1,356,222	$ 2,214,302	$ 823,623	$ 2,278,270	$ 6,210,732		$ 6,672,417		$ (308,645)
Net income (loss) attributable to Oaktree Capital Group, LLC:
Income tax expense of Intermediate Holding Companies									(26,232)	[1]	(30,858)	[1]	(21,088)	[1]
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)
OCGH non-controlling interest
Weighted average Oaktree Operating Group units outstanding (in thousands):
Class A units outstanding (in shares)									115,992		122,369		125,956
Oaktree Operating Group net income (loss):
Oaktree Operating Group net income (loss):									824,795		548,265		(446,246)
Class A Units
Weighted average Oaktree Operating Group units outstanding (in thousands):
Class A units outstanding (in shares)									34,979		28,170		22,677
Oaktree Operating Group net income (loss):
Oaktree Operating Group net income (loss):									243,250		126,826		(80,391)
Oaktree Operating Group
Weighted average Oaktree Operating Group units outstanding (in thousands):
Class A units outstanding (in shares)									150,971		150,539		148,633
Oaktree Operating Group net income (loss):
Oaktree Operating Group net income (loss):									1,068,045		675,091		(526,637)
Oaktree Capital Group, LLC
Net income (loss) attributable to Oaktree Capital Group, LLC:
Oaktree Operating Group net income (loss) attributable to Class A unitholders									243,250		126,826		(80,391)
Non-Operating Group other income									0		6,260		0
Non-Operating Group expenses									(1,195)		(553)		(768)
Income tax expense of Intermediate Holding Companies									(20,057)		(24,723)		(14,813)
Net income (loss) attributable to Oaktree Capital Group, LLC									$ 221,998		$ 107,810		$ (95,972)

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