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Earnings Per Share
 12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Share
23.  Earnings Per Share


The following table sets forth the computation of basic and diluted earnings per share:

Year Ended December 31
(in thousands except per share data)
  
2020
    
2019
    
2018
  
Numerator:
                  
Net income
  
$
59,504
    
$
64,540
    
$
59,228
  
                         
Denominator:
                        
Basic earnings per share:
                        
Weighted average shares
    
17,748
      
17,724
      
17,687
  
Diluted earnings per share:
                        
Dilutive effect of equity grants
    
8
      
16
      
16
  
Adjusted weighted average shares
    
17,756
      
17,740
      
17,703
  
                         
Earnings per share:
                        
Basic earnings per share
  
$
3.35
    
$
3.64
    
$
3.35
  
Diluted earnings per share
    
3.35
      
3.64
      
3.35
  


There were no options to purchase common shares that were excluded from the diluted calculations above for the years ended December 31, 2020, 2019, and 2018.  In addition to in-the-money stock options, unvested restricted stock grants were also used in the calculation of diluted earnings per share based on the treasury method.