Equity-Based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended			3 Months Ended	6 Months Ended	3 Months Ended			6 Months Ended		1 Months Ended		6 Months Ended		1 Months Ended
	Jun. 30, 2012	Jul. 01, 2012	Jun. 30, 2012 2011 Plan [Member]	Mar. 31, 2012 OCGH Units [Member]	Jun. 30, 2012 OCGH Units [Member]	Mar. 31, 2012 OCGH Units [Member] Restricted Stock Units (RSUs) [Member]	Mar. 31, 2012 OCGH Units [Member] Restricted Stock Units (RSUs) [Member] Maximum [Member]	Mar. 31, 2012 OCGH Units [Member] Restricted Stock Units (RSUs) [Member] Minimum [Member]	Jun. 30, 2012 OCGH Units [Member] 2007 Plan [Member]	Jun. 30, 2012 OCGH Units [Member] 2011 Plan [Member]	Jun. 30, 2012 Class A units	Jan. 31, 2012 Class A units	Jun. 30, 2012 Class A units	Jun. 30, 2012 Class C units	Jan. 31, 2012 Five Years [Member] Class A units [Member]	Jan. 31, 2012 Four Year [Member] Class A units [Member]
Equity Based Compensation (Textual) [Abstract]
Compensation expense over the service period					$ 4,644.8
Equity instrument vesting percentage					20.00%
Units authorized for issuance			22,300,000						22,278,632
Units issued									4,954,976	2,327,471
Units issued				1,966,302
Units vesting periods							10 years	5 years							5 years
Additional units issued						346,200
Additional units awarded					2,312,502						1,423	13,546	14,969
Additional units vested upon grant					21,567,234							3,900	3,900	600
Units vested in equal annual installments															4,546
Units vesting in increments																5,100
Aggregate grant date fair value				76.3
Discount applied to determine aggregate grant date fair value				25.00%
Equity Based Compensation (Additional Textual) [Abstract]
Unrecognized compensation expense on non-vested equity-based awards		$ 115.0
Weighted average period of recognition non-vested equity-based awards	5 years 9 months 18 days
Total vested and unvested outstanding units	150,431,686