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Earnings Per Share
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share

Basic earnings per share (“basic EPS”) is computed by dividing net income by the weighted average number of common shares outstanding for the reporting period. Diluted earnings per share (“diluted EPS”) gives effect to all dilutive potential shares outstanding resulting from employee stock options, restricted stock units, performance share units and stock appreciation rights (“SARs”) during the period. The following table sets forth the computation of basic and diluted earnings per share for the three and six months ended June 30, 2012 and 2013.


Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2013
 
2012
 
2013



 


 


 


Net income
$
10,296

 
$
9,533

 
$
20,264

 
$
20,025




 


 


 


Basic – weighted average shares outstanding
28,327

 
27,591

 
28,178

 
27,860




 


 


 


Effect of dilutive potential securities
345

 
392

 
399

 
398




 


 


 


Diluted – weighted average shares outstanding
28,672

 
27,983

 
28,577

 
28,258




 


 


 


Net income
 

 
 

 
 

 
 

Basic (per share)
$0.36
 
$0.35
 
$0.72
 
$0.72
Diluted (per share)
$0.36
 
$0.34
 
$0.71
 
$0.71

 
The shares used in the calculation of diluted EPS exclude options and SARs to purchase shares where the exercise price was greater than the average market price of common shares for the period. Shares excluded from the calculation of diluted EPS aggregated 0.4 million and 0.1 million for the three months ended June 30, 2012 and 2013, respectively. Shares excluded from the calculation of diluted EPS aggregated 0.4 million and 0.1 million for the six months ended June 30, 2012 and 2013, respectively.