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Equity-Based Compensation (Details) (USD $)
1 Months Ended 6 Months Ended
Jun. 30, 2012
Jan. 31, 2012
Jun. 30, 2012
Class A units
     
Equity-Based Compensation Number of Units      
Number of units, Granted 1,423 13,546 14,969
Number of units, Vested   (3,900) (3,900)
Number of units, Exchanged     600
Number of units, Ending Balance 11,669   11,669
Equity-Based Compensation Weighted average grant date fair value      
Weighted average grant date fair value, Granted     $ 43.14
Weighted average grant date fair value, Vested     $ 44.00
Weighted average grant date fair value, Exchanged     $ 24.75
Weighted average grant date fair value, Ending Balance $ 41.91   $ 41.91
Class C units
     
Equity-Based Compensation Number of Units      
Number of units, Beginning Balance   1,200 1,200
Number of units, Vested     (600)
Number of units, Exchanged     (600)
Number of units, Ending Balance        
Equity-Based Compensation Weighted average grant date fair value      
Weighted average grant date fair value, Beginning Balance   24.75 $ 24.75
Weighted average grant date fair value, Vested     $ 24.75
Weighted average grant date fair value, Exchanged     $ 24.75
Weighted average grant date fair value, Ending Balance        
OCGH Units [Member]
     
Equity-Based Compensation Number of Units      
Number of units, Beginning Balance   24,130,569 24,130,569
Number of units, Granted     2,312,502
Number of units, Vested     (21,567,234)
Number of units, Forfeited     (5,000)
Number of units, Ending Balance 4,870,837   4,870,837
Equity-Based Compensation Weighted average grant date fair value      
Weighted average grant date fair value, Beginning Balance   41.13 $ 41.13
Weighted average grant date fair value, Granted     $ 33.00
Weighted average grant date fair value, Vested     $ 43.15
Weighted average grant date fair value, Forfeited     $ 19.67
Weighted average grant date fair value, Ending Balance $ 28.36   $ 28.36