UNITHOLDERS' CAPITAL - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Total unitholders’ capital	$ 1,744,426	$ 1,888,052	$ 1,744,426	$ 1,888,052	$ 1,808,094	$ 1,840,130
OCGH non-controlling interest	$ 84,468	55,509	$ 144,502	163,610
OCGH
Class of Stock [Line Items]
Unitholders' capital (in shares)	92,340,656		92,340,656		91,937,873
Total unitholders’ capital	$ 958,732		$ 958,732		$ 941,141
Oaktree Operating Group
Class of Stock [Line Items]
Total Oaktree Operating Group units (in shares)	154,943,451		154,943,451		153,907,733
Total unitholders’ capital	$ 1,608,709		$ 1,608,709		$ 1,575,504
OCGH non-controlling interest	1,212	$ 1,269	2,420	$ 604
Equity Held by Third Parties
Class of Stock [Line Items]
Total unitholders’ capital	$ 11,140		$ 11,140		$ 102,789