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SHAREHOLDERS' EQUITY - Unvested Restricted Stock (Details) - Restricted Stock
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Shares  
Unvested at beginning of the year (in shares) | shares 172,595
Granted (in shares) | shares 81,846
Vested (in shares) | shares (81,547)
Forfeited (in shares) | shares (9,134)
Unvested at end of the year (in shares) | shares 163,760
Weighted Average Grant- Date Fair Value  
Unvested at the beginning of the year (in dollars per share) | $ / shares $ 23.14
Granted (in dollars per share) | $ / shares 23.49
Vested (in dollars per share) | $ / shares 23.58
Forfeited (in dollars per share) | $ / shares 23.71
Unvested at the end of the year (in dollars per share) | $ / shares $ 23.06