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Earnings Per Share
9 Months Ended
Sep. 30, 2011
Earnings Per Share [Abstract] 
Earnings Per Share
Note 3 – Earnings Per Share
Basic earnings per share is computed using the weighted-average number of shares outstanding. Diluted earnings per share is computed using the weighted-average number of shares outstanding adjusted for the incremental shares attributed to outstanding stock equivalents during the three and nine months ended September 30, 2011 and 2010. Stock equivalents include common shares issuable upon the exercise of stock options and other equity instruments, and are computed using the treasury stock method. Under the treasury stock method, the exercise price of a share, the amount of compensation cost, if any, for future service that the Company has not yet recognized and the amount of estimated tax benefits that would be recorded in paid-in-capital, if any, when the share is exercised are assumed to be used to repurchase shares in the current period.

The following table sets forth the calculation of basic and diluted earnings per share.

   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
(in thousands, except per share data)
 
2011
   
2010
   
2011
   
2010
 
Net income
  $ 19,867     $ 22,469     $ 49,081     $ 60,748  
                                 
Denominator for basic earnings per share - weighted-average number of common shares outstanding during the period
    58,615       61,712       59,889       62,597  
Incremental common shares attributable to exercise of outstanding dilutive options
    177       305       298       474  
Incremental common shares attributable to outstanding restricted shares, restricted stock units and phantom stock
    87       86       204       91  
Denominator for diluted earnings per share
    58,879       62,103       60,391       63,162  
                                 
Basic earnings per share
  $ 0.34     $ 0.36     $ 0.82     $ 0.97  
Diluted earnings per share
  $ 0.34     $ 0.36     $ 0.81     $ 0.96  

Options to purchase 3.8 million and 3.5 million common shares for the three and nine months ended September 30, 2011, respectively, were not included in the computation of diluted earnings per share because the option exercise price was greater than the average market price of the common shares. Options to purchase 3.7 million and 2.9 million common shares for the three and nine months ended September 30, 2010, respectively, were not included in the computation of diluted earnings per share because the option exercise price was greater than the average market price of the common shares.