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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2012
Earnings Per Share [Abstract]  
Computation Of Basic And Diluted Earnings Per Share
     Three Months Ended March 31,  
     2012      2011  
     (Unaudited)  

Numerator (both basic and diluted):

      

Net income (loss)

    $ 19,631       $ (18,493 ) 

Denominator:

      

Denominator for basic earnings per share

      40,758,074         39,884,070   

Stock options

      233,344         —     

Unvested restricted stock

      637,482         —     
  

 

 

     

 

 

  

Denominator for diluted earnings per share

      41,628,900         39,884,070   
  

 

 

     

 

 

  

Basic earnings per common share:

    $ 0.48       $ (0.46 ) 
  

 

 

     

 

 

  

Diluted earnings per common share:

    $ 0.47       $ (0.46 )