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Equity Compensation Plans - Restricted Stock Activity (Details) - Restricted Stock Awards - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Shares      
Beginning of period (in shares) 216,470 334,606 257,507
Granted (in shares) 0 0 168,537
Vested (in shares) (102,615) (118,136) (83,968)
Forfeited (in shares) (34,857) 0 (7,470)
Balance at End of Period (in shares) 78,998 216,470 334,606
Weighted Average Grant Date Fair Market Value      
Beginning of period (in dollars per share) $ 14.85 $ 14.92 $ 15.23
Granted (in dollars per share) 0 0 14.71
Vested (in dollars per share) 14.44 15.05 15.46
Forfeited (in dollars per share) 15.16 0 15.05
Balance at End of Period (in dollars per share) $ 15.23 $ 14.85 $ 14.92