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STOCK OPTIONS - Summary of Nonvested Restricted Stock Awards and Units Activity (Details) - Restricted Stock Awards And Units [Member] - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Number of Shares    
Outstanding at beginning of year (in shares) 1,439 2,398
Granted (in shares) 30,500 0
Vested (in shares) (480) (959)
Forfeited (in shares) 0 0
Balance (in shares) 31,459 1,439
Outstanding at beginning of year $ 31.57 $ 31.57
Granted 30.25 0
Vested 31.57 31.57
Forfeited 0 0
Balance $ 30.29 $ 31.57