EQUITY-BASED COMPENSATION - Summary of Unvested Equity-Based Awards and Changes (Parenthetical) (Detail)	1 Months Ended	3 Months Ended
	Jan. 31, 2013	Mar. 31, 2013
OCGH Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional units awarded	522,000
Additional units vested upon grant		1,050,369
Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional units awarded	8,508	8,508	[1]
Additional units vested upon grant		2,784
2007 Plan [Member] | OCGH Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date		30.00%

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