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Earnings Per Share
 6 Months Ended
Jun. 30, 2014
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 six months ended June 30, 2014 and 2013. 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 Six Months Ended
   June 30, June 30,
(in thousands, except per share data)  2014  2013  2014  2013
Net income $22,150 $8,457 $41,275 $19,944
              
Denominator for basic earnings per share -            
 weighted-average number of common            
 shares outstanding during the period  53,826  54,207  53,738  54,500
Incremental common shares attributable to            
 exercise of outstanding dilutive options  443  205  461  213
Incremental common shares attributable            
 to outstanding restricted shares and            
 restricted stock units  136  88  195  184
Denominator for diluted earnings per share  54,405  54,500  54,394  54,897
              
Basic earnings per share $0.41 $0.16 $0.77 $0.37
Diluted earnings per share $0.41 $0.16 $0.76 $0.36

Options to purchase 0.7 million and 0.7 million common shares for the three and six months ended June 30, 2014, respectively, were not included in the computation of diluted earnings per share because their effect would have been anti-dilutive. Options to purchase 3.2 million common shares for both the three and six month periods June 30, 2013 were not included in the computation of diluted earnings per share because their effect would have been anti-dilutive.