Unitholders' Capital (Details Textual) (USD $)	1 Months Ended	6 Months Ended
	Dec. 31, 2011	Jun. 30, 2012
Unitholders Capital (Textual) [Abstract]
OCGH units represented	125,847,115	120,250,753
Total Oaktree Operating Group units	148,524,215	150,431,686
Total Oaktree Operating Group capital	$ 1,104,493,000	$ 1,220,844,000
OCGH non-controlling interest in consolidated subsidiaries	935,858,000	975,908,000
Class A units
Class of Stock [Line Items]
Convertible shares		13,000
Class A units cancelled		400,000
Purchase price of shares		$ 14,100,000
Purchase price per shares		$ 35.30