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Earnings Per Share
 12 Months Ended
Dec. 31, 2013
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)
 
2013
  
2012
  
2011
 
Numerator:
         
Net income
 $45,172  $44,862  $38,827 
              
Denominator:
            
Basic earnings per share:
            
Weighted average shares
  15,598   15,466   15,313 
Diluted earnings per share:
            
Dilutive effect of equity grants
  75   55   51 
Adjusted weighted average shares
  15,673   15,521   15,364 
              
Earnings per share:
            
Basic earnings per share
 $2.90  $2.90  $2.54 
Diluted earnings per share
  2.88   2.89   2.53 
 
Options to purchase 59,563 common shares at a weighted average price of $38.95 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.  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 89,746 common shares at a price of $38.95 were excluded from the diluted calculations above for the year ended December 31, 2012.  Options to purchase 323,255 common shares at a price of $33.02 were excluded from the diluted calculations above for the year ended December 31, 2011.