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Share-Based Compensation (Details) (USD $)
 1 Months Ended 2 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Oct. 31, 2007
CALLC Pre Split
entity
May 31, 2011
CALLC -Post Split
Feb. 28, 2011
CALLC -Post Split
Feb. 28, 2011
CALLC II
Dec. 31, 2011
CALLC, CALLC II and CALLC III
Dec. 31, 2010
CALLC, CALLC II and CALLC III
Dec. 31, 2009
CALLC, CALLC II and CALLC III
Jun. 30, 2005
Override Operating Units (a)
CALLC and CALLC II
Dec. 31, 2010
Override Operating Units (a)
CALLC and CALLC II
Dec. 31, 2009
Override Operating Units (a)
CALLC and CALLC II
Dec. 31, 2011
Override Operating Units (a)
CALLC and CALLC II
Dec. 31, 2006
Override Operating Units (b)
CALLC and CALLC II
Dec. 31, 2010
Override Operating Units (b)
CALLC and CALLC II
Dec. 31, 2009
Override Operating Units (b)
CALLC and CALLC II
Dec. 31, 2011
Override Operating Units (b)
CALLC and CALLC II
Jun. 30, 2005
Override Value Units (c)
CALLC and CALLC II
Dec. 31, 2011
Override Value Units (c)
CALLC and CALLC II
Dec. 31, 2010
Override Value Units (c)
CALLC and CALLC II
Dec. 31, 2009
Override Value Units (c)
CALLC and CALLC II
Dec. 31, 2006
Override Value Units (d)
CALLC and CALLC II
Dec. 31, 2011
Override Value Units (d)
CALLC and CALLC II
Dec. 31, 2010
Override Value Units (d)
CALLC and CALLC II
Dec. 31, 2009
Override Value Units (d)
CALLC and CALLC II
Feb. 29, 2008
Override Units (e)
CALLC III
Dec. 31, 2011
Override Units (e)
CALLC III
Dec. 31, 2010
Override Units (e)
CALLC III
Dec. 31, 2009
Override Units (e)
CALLC III
Share-based Compensation                                                      
Number of entities into which the limited liability company was split 2                                                    
Number of common stocks sold into the public market (in shares)   7,988,179 11,759,023 15,113,254                                              
Key information for the share-based compensation plans related to the override units of CALLC, CALLC II and CALLC III                                                      
Benchmark Value (per Unit)                     $ 11.31       $ 34.72   $ 11.31       $ 34.72       $ 10.00    
Original Award Issued (in shares)               919,630       72,492       1,839,265       144,966       642,219      
Compensation Expense Increase (Decrease)         $ 5,595,000 $ 19,290,000 $ 4,158,000   $ 338,000 $ 1,369,000     $ 13,000 $ 36,000     $ 4,960,000 $ 17,586,000 $ 2,690,000   $ 451,000 $ 581,000 $ 37,000   $ 184,000 $ 772,000 $ 26,000
Valuation Assumptions                                                      
Derived service period (in years)                                   6 years 6 years     6 years 6 years        
CVR closing stock price (in dollars per share)                   $ 6.86       $ 6.86       $ 15.18 $ 6.86     $ 15.18 $ 6.86        
Estimated fair value (per unit)                   $ 11.95       $ 1.4       $ 22.39 $ 5.63     $ 6.56 $ 1.39     $ 2.6 $ 0.08
Marketability and minority interest discounts (as a percent)                   20.00%       20.00%       20.00% 20.00%     20.00% 20.00%     10.00% 20.00%
Volatility (as a percent)                   50.70%       50.70%       43.00% 50.70%     43.00% 50.70%     47.60% 59.70%
Information of all overrides value units that are initially subject to forfeiture                                                      
Estimated grant date fair value                                                 $ 3,000    
Number of units vested upon issuance (in shares)                                               109,720