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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2021
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
June 30
    
Six Months Ended
June 30
  
(in thousands except per share data)
  
2021
    
2020
    
2021
    
2020
  
Numerator:
                        
Net income
  
$
23,931
    
$
19,652
    
$
47,549
    
$
26,231
  
                                 
Denominator:
                                
Basic earnings per share:
                                
Weighted average shares
    
17,784
      
17,739
      
17,779
      
17,746
  
Diluted earnings per share:
                                
Effect of dilutive stock options and restricted stock grants
    
16
      
3
      
15
      
7
  
Adjusted weighted average shares
    
17,800
      
17,742
      
17,794
      
17,753
  
                                 
Earnings per share:
                                
Basic earnings per share
  
$
1.35
    
$
1.11
    
$
2.67
    
$
1.48
  
Diluted earnings per share
    
1.34
      
1.11
      
2.67
      
1.48