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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2018
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
  
Six Months Ended
 
  
June 30
  
June 30
 
(in thousands except per share data)
 
2018
  
2017
  
2018
  
2017
 
Numerator:
            
Net income
 
$
11,599
  
$
11,541
  
$
27,413
  
$
22,818
 
                 
Denominator:
                
Basic earnings per share:
                
Weighted average shares
  
17,687
   
17,626
   
17,679
   
17,621
 
Diluted earnings per share:
                
Effect of dilutive stock options and restricted stock grants
  
16
   
19
   
16
   
20
 
Adjusted weighted average shares
  
17,703
   
17,645
   
17,695
   
17,641
 
                 
Earnings per share:
                
Basic earnings per share
 
$
0.66
  
$
0.65
  
$
1.55
  
$
1.29
 
Diluted earnings per share
  
0.66
   
0.65
   
1.55
   
1.29