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Share-Based Compensation (Details 2) (USD $)
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
CVR Partners LTIP
Mar. 31, 2012
CVR Partners LTIP
Mar. 31, 2013
CVR Energy, Inc
CVR Partners LTIP
Phantom and common units
Mar. 31, 2013
CVR Energy, Inc
CVR Energy LTIP
Restricted stock units
Share-Based Compensation            
Common stock authorized for issuance (in shares)     5,000,000      
Vesting period         3 years 3 years
Unrecognized compensation cost     $ 3,000,000      
Weighted-average period for amortization of unrecognized compensation cost     1 year 4 months 10 days      
Compensation expense     600,000 700,000    
Non-vested shares activity            
Non-vested at the beginning of the period (in shares)     201,812      
Non-vested at the end of the period (in shares)     201,812      
Weighted-Average Grant-Date Fair Value            
Non-vested at the beginning of the period (in dollars per share)     $ 23.70      
Non-vested at the end of the period (in dollars per share)     $ 23.70      
Other disclosures            
Liability for unvested awards related to employees $ 2,443,000 $ 4,931,000 $ 300,000      
Fraction of stock awards vested per year (as a percent)           33.33%