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Earnings Per Share
 12 Months Ended
Dec. 31, 2012
Earnings Per Share  
Earnings Per Share

(13) Earnings Per Share

        The computations of the basic and diluted earnings per share for the year ended December 31, 2012, 2011 and 2010 are as follows:

 
   For the Year Ended December 31,  
 
   2012   2011   2010  
 
   (in thousands, except share data)
  

Net income attributable to CVR Energy stockholders

   $ 378,605   $ 345,776   $ 14,290  

Weighted-average number of shares of common stock outstanding

     86,822,913     86,493,735     86,340,342  

Effect of dilutive securities:

                    

Non-vested restricted shares

     567,166     1,268,471     448,837  

Stock options

     2,191     4,367     —  
               

Weighted-average number of shares of common stock outstanding assuming dilution

     87,392,270     87,766,573     86,789,179  
               

Basic earnings per share

   $ 4.36   $ 4.00   $ 0.17  

Diluted earnings per share

   $ 4.33   $ 3.94   $ 0.16  

        Outstanding stock options totaling 18,533 and 22,900 common shares were excluded from the diluted earnings per share calculation for the years ended December 31, 2011 and 2010, respectively, as they were antidilutive. No stock options were excluded from the diluted earnings per share calculation for the year ended December 31, 2012.