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Earnings per Share (Tables)
 9 Months Ended
Sep. 30, 2022
Earnings per Share [Abstract]  
Computation of Earnings per Share

The following table sets forth the computation of earnings per share.

   
Three months ended
September 30,
    
Nine months ended
September 30,
  
   
2022
    
2021
    
2022
    
2021
  
Net income applicable to common stock
  
$
7,544,000
    
$
7,064,000
    
$
21,185,000
    
$
22,174,000
  
                                 
Basic earnings per share computation
                                
Weighted average common shares outstanding
    
3,967,585
      
3,988,294
      
3,970,646
      
3,984,748
  
Earnings per share - basic
  
$
1.90
    
$
1.77
    
$
5.34
    
$
5.56
  
                                 
Diluted earnings per share computation
                                
Weighted average common shares outstanding for basic earnings per share
    
3,967,585
      
3,988,294
      
3,970,646
      
3,984,748
  
Add: Dilutive effects of restricted stock
    
234
      
95
      
2
      
7
  
Weighted average common shares outstanding for dilutive earnings per share
    
3,967,819
      
3,988,389
      
3,970,648
      
3,984,755
  
Earnings per share - diluted
  
$
1.90
    
$
1.77
    
$
5.34
    
$
5.56