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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Computation of basic and diluted earnings per share
The following table sets forth the computation of basic and diluted earnings per share:

   
Three Months Ended
  
Nine Months Ended
 
   
September 30
  
September 30
 
(in thousands except per share data)
 
2014
  
2013
  
2014
  
2013
 
Numerator:
            
Net income
 $10,924  $12,653  $33,259  $36,415 
                  
Denominator:
                
Basic earnings per share:
                
Weighted average shares
  17,326   17,154   17,317   17,123 
Diluted earnings per share:
                
Effect of dilutive stock options and restricted stock grants
  76   103   78   89 
Adjusted weighted average shares
  17,402   17,257   17,395   17,212 
                  
Earnings per share:
                
Basic earnings per share
 $0.63  $0.74  $1.92  $2.13 
Diluted earnings per share
  0.63   0.73   1.91   2.12