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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2015
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)
 
2015
  
2014
  
2015
  
2014
 
Numerator:
        
Net income
 
$
12,402
  
$
12,195
  
$
23,340
  
$
22,335
 
                 
Denominator:
                
Basic earnings per share:
                
Weighted average shares
  
17,421
   
17,318
   
17,411
   
17,313
 
Diluted earnings per share:
                
Effect of dilutive stock options and restricted stock grants
  
44
   
75
   
47
   
80
 
Adjusted weighted average shares
  
17,465
   
17,393
   
17,458
   
17,393
 
                 
Earnings per share:
                
Basic earnings per share
 
$
0.71
  
$
0.70
  
$
1.34
  
$
1.29
 
Diluted earnings per share
  
0.71
   
0.70
   
1.34
   
1.28