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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2016
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
 
  
March 31
 
(in thousands except per share data)
 
2016
  
2015
 
Numerator:
      
Net income
 
$
11,602
  
$
10,938
 
         
Denominator:
        
Basic earnings per share:
        
Weighted average shares
  
17,513
   
17,400
 
Diluted earnings per share:
        
Effect of dilutive stock options and restricted stock grants
  
20
   
51
 
Adjusted weighted average shares
  
17,533
   
17,451
 
         
Earnings per share:
        
Basic earnings per share
 
$
0.66
  
$
0.63
 
Diluted earnings per share
  
0.66
   
0.63