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Earnings Per Share
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share
22.  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)
 
2014
  
2013
  
2012
 
Numerator:
      
Net income
 
$
43,251
  
$
45,172
  
$
44,862
 
             
Denominator:
            
Basic earnings per share:
            
Weighted average shares
  
17,326
   
17,158
   
17,013
 
Diluted earnings per share:
            
Dilutive effect of equity grants
  
71
   
82
   
60
 
Adjusted weighted average shares
  
17,397
   
17,240
   
17,073
 
             
Earnings per share:
            
Basic earnings per share
 
$
2.50
  
$
2.63
  
$
2.64
 
Diluted earnings per share
  
2.49
   
2.62
   
2.63
 

There were no options to purchase common shares that were excluded from the diluted calculations above for the year ended December 31, 2014.  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.  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, because the exercise prices on the options were greater than the average market price for the period.  Options to purchase 98,720 common shares at a price of $35.409 were excluded from the diluted calculations above for the year ended December 31, 2012.