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Earnings Per Share
12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Earnings Per Share
23.  Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

Year Ended December 31
(in thousands except per share data)
 
2015
  
2014
  
2013
 
Numerator:
      
Net income
 
$
46,432
  
$
43,251
  
$
45,172
 
             
Denominator:
            
Basic earnings per share:
            
Weighted average shares
  
17,431
   
17,326
   
17,158
 
Diluted earnings per share:
            
Dilutive effect of equity grants
  
52
   
71
   
82
 
Adjusted weighted average shares
  
17,483
   
17,397
   
17,240
 
             
Earnings per share:
            
Basic earnings per share
 
$
2.66
  
$
2.50
  
$
2.63
 
Diluted earnings per share
  
2.66
   
2.49
   
2.62
 

Options to purchase 58,063 common shares at a weighted average price of $35.409 were excluded from the diluted calculations above for the year ended December 31, 2015, because the exercise prices on the options were greater than the average market price for the period.  In addition to in-the-money stock options, unvested restricted stock grants were also used in the calculation of diluted earnings per share based on the treasury method. There were no options to purchase common shares that were excluded from the diluted calculations above for the year ended December 31, 2014.  Options to purchase 65,519 common shares at a weighted average price of $35.409 were excluded from the diluted calculations above for the year ended December 31, 2013.