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STOCK COMPENSATION - NONVESTED SHARES (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
plan
$ / shares
shares
Mar. 31, 2019
shares
Dec. 31, 2019
$ / shares
shares
Stock Based Compensation      
Number of share based compensation plans | plan 3    
2005 Restricted Stock Grant Plan | Restricted stock      
Stock Based Compensation      
Number of shares authorized for issuance 100,000    
Shares available for issuance 0    
Shares      
Nonvested at the beginning of the period (in shares) 1,580    
Granted (in shares) 0   0
Vested (in shares) (1,580)    
Forfeited (in shares) 0 (12)  
Nonvested at the end of the period (in shares)     1,580
Weighted-Average Grant-Date      
Nonvested shares, balance at the beginning of the period | $ / shares $ 13.67    
Vested | $ / shares $ (13.67)    
Nonvested shares, balance at the end of the period | $ / shares     $ 13.67
Additional disclosures      
Unrecognized compensation cost related to nonvested shares granted | $ $ 0    
2009 Stock Award Plan      
Stock Based Compensation      
Number of shares authorized for issuance 300,000    
Shares available for issuance 0    
Shares      
Nonvested at the beginning of the period (in shares) 38,482    
Granted (in shares) 0 23,380  
Vested (in shares) (12,855)    
Forfeited (in shares) 0 (108)  
Nonvested at the end of the period (in shares) 25,627   38,482
Weighted-Average Grant-Date      
Nonvested shares, balance at the beginning of the period | $ / shares $ 21.46    
Vested | $ / shares 20.98    
Nonvested shares, balance at the end of the period | $ / shares $ 21.70   $ 21.46
2019 Stock Award Plan      
Stock Based Compensation      
Number of shares authorized for issuance 300,000    
Shares      
Granted (in shares) 30,030 0  
Forfeited (in shares) 0 0  
Nonvested at the end of the period (in shares) 30,030    
Weighted-Average Grant-Date      
Vested | $ / shares $ 23.11    
Nonvested shares, balance at the end of the period | $ / shares $ 23.11