EQUITY-BASED COMPENSATION - Schedule of Unvested Units Expected to Vest (Detail)	Mar. 31, 2013
Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Units	17,393
Weighted average remaining service term (years)	4 years 2 months 0 days
OCGH Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Units	4,423,979
Weighted average remaining service term (years)	5 years 6 months 0 days