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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Summary of Earnings Per Share, Basic and Diluted

The calculation and reconciliation of basic and diluted earnings per share for the years ended December 31 (in thousands, except per share data):

 

     2012      2011      2010  

Numerator for basic earnings per share:

         

Net income

    $ 216,199       $ 147,335       $ 107,896   

Convertible preferred stock accrued dividends

      —          —          (1,488 ) 
  

 

 

     

 

 

     

 

 

  

Earnings attributable to common shareholders for basic earnings per share

    $ 216,199       $ 147,335       $ 106,408   
  

 

 

     

 

 

     

 

 

  

Numerator for diluted earnings per share:

         

Income attributable to common shareholders for basic earnings per share

    $ 216,199       $ 147,335       $ 106,408   

Effect of convertible preferred stock

      —          —          1,488   
  

 

 

     

 

 

     

 

 

  

Net earnings for diluted earnings per share

    $ 216,199       $ 147,335       $ 107,896   
  

 

 

     

 

 

     

 

 

  

Denominator for basic and diluted earnings per share:

         

Weighted-average shares outstanding

      82,553         79,477         33,704   

Share-based payment awards classified as participating securities

      775         1,133         1,730   
  

 

 

     

 

 

     

 

 

  

Denominator for basic earnings per share

      83,328         80,610         35,434   

Dilutive securities

      2,408         3,044         3,055   

Convertible preferred stock

      —          —          42,262   
  

 

 

     

 

 

     

 

 

  

Denominator for diluted earnings per share

      85,736         83,654         80,751   
  

 

 

     

 

 

     

 

 

  

Basic earnings per share

    $ 2.59       $ 1.83       $ 3.00   

Diluted earnings per share

      2.52         1.76         1.34