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Stock Incentive Plan And Employee Stock Purchase Plan (Summary Of Non-Vested Stock Awards) (Details) - Restricted Stock [Member] - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Non-Vested Awards, Beginning Balance 35,254 49,460
Non-Vested Awards, Granted 47,186 10,799
Non-Vested Awards, Vested (20,656) (25,005)
Non-Vested Awards, Ending Balance 61,784 35,254
Non-Vested Awards, Beginning Balance, Weighted Average Grant Date Fair Value $ 13.63 $ 13.78
Non-Vested Awards Granted, Weighted Average Grant Date Fair Value 12.45 14.92
Non-Vested Awards Vested, Weighted Average Grant Date Fair Value 12.82 14.49
Non-Vested Awards, Ending Balance, Weighted Average Grant Date Fair Value $ 13.13 $ 13.63