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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]  
Computation of Earnings per Share

The following table sets forth the computation of earnings per share.  Earnings per share calculations give retroactive effect to stock dividends declared by the Company.

  
2020
    
2019
    
2018
  
Basic earnings per share computation:
                  
Net income applicable to common stock
  
$
25,103,000
    
$
19,490,000
    
$
18,034,000
  
Weighted average common shares outstanding
    
3,805,682
      
3,559,150
      
3,577,992
  
Earnings per share - basic
  
$
6.60
    
$
5.48
    
$
5.04
  
                         
Diluted earnings per share computation:
                        
Net income applicable to common stock
  
$
25,103,000
    
$
19,490,000
    
$
18,034,000
  
                         
Weighted average common shares outstanding for basic earnings per share
    
3,805,682
      
3,559,150
      
3,577,992
  
Add: Dilutive effects of restricted stock
    
1,841
      
2,096
      
1,988
  
Weighted average common shares outstanding for dilutive earnings per share
    
3,807,523
      
3,561,246
      
3,579,980
  
Earnings per share - dilutive
  
$
6.59
    
$
5.47
    
$
5.04