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EQUITY AWARDS - Summary of Restricted Stock Awards and Units Activity (Details) - Restricted Stock Awards And Units [Member] - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Number of Shares    
Outstanding at beginning of year (in shares) 35,300 31,459
Effect of 10% stock dividend (in shares) 3,530  
Granted (in shares) 3,500 19,500
Vested (in shares) (12,140) (15,179)
Forfeited (in shares)   (480)
Balance (in shares) 30,190 35,300
Weighted-Average Grant Date Fair Value    
Outstanding at beginning of year $ 29.72 $ 30.29
Granted 33.09 29.32
Vested 27.05 30.33
Forfeited $ 27.52 31.57
Balance   $ 29.72