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Share-Based Compensation (Details 4) (USD $)
9 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Apr. 30, 2011
Share-based Compensation        
Additional share based compensation incurred on modification of awards   $ 9,924,000    
Weighted-Average Grant-Date Fair Value        
Liability for unvested restricted share awards 20,849,000 51,154,000 20,849,000  
CVR Partners, LP | Long-Term Incentive Plan - CVR Partners
       
Share-based Compensation        
Common stock authorized for issuance (in shares)   4,748,893   5,000,000
Non-vested shares activity        
Non-vested at the beginning of the period (in shares)   164,571    
Granted (in shares) 200,647 95,370    
Vested (in shares) (36,076) (58,129)    
Non-vested at the end of the period (in shares) 164,571 201,812 164,571  
Weighted-Average Grant-Date Fair Value        
Non-vested at the beginning of the period (in dollars per share)   $ 22.99    
Granted (in dollars per share) $ 22.34 $ 24.53    
Vested (in dollars per share) $ 19.36 $ 23.08    
Non-vested at the end of the period (in dollars per share) $ 22.99 $ 23.70 $ 22.99  
Aggregate Intrinsic Value 4,085,000 5,094,000 4,085,000  
Compensation expense   2,200,000 1,200,000  
CVR Partners, LP | Long-Term Incentive Plan - CVR Partners | Units | Employees of general partner
       
Share-based Compensation        
Vesting period   3 years    
CVR Partners, LP | Long-Term Incentive Plan - CVR Partners | Phantom stock units
       
Share-based Compensation        
Unrecognized compensation cost   3,600,000    
Weighted-average period for amortization of unrecognized compensation cost (in years)   1.6    
Weighted-Average Grant-Date Fair Value        
Liability for unvested restricted share awards   200,000    
Cash paid to settle liability-classified awards upon vesting   $ 300,000    
CVR Partners, LP | Long-Term Incentive Plan - CVR Partners | Phantom stock units | Employees of general partner and CRNF and employee of CVR Energy
       
Share-based Compensation        
Vesting period   3 years