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Stock-Based Compensation (Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity) (Details) - Restricted Stock [Member]
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Dec. 31, 2018
$ / shares
shares
Dec. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning period, nonvested number of shares (in shares) | shares 25,473 32,809 47,881
Shares granted (in shares) | shares 6,524 10,662 6,752
Shares vested (in shares) | shares (17,557) (17,607) (21,738)
Shares cancelled (in shares) | shares 0 (391) (86)
Ending period, nonvested number of shares (in shares) | shares 14,440 25,473 32,809
Beginning period, weighted average grant date fair value (in dollars per share) | $ / shares $ 28.76 $ 22.61 $ 20.41
Weighted average grant date fair value, granted (in dollars per share) | $ / shares 31.82 36.43 30.20
Weighted average grant date fair value, vested (in dollars per share) | $ / shares $ 25.83 $ 21.85 $ 20.13
Weighted average grant date fair value, cancelled (in dollars per share) | $ / shares 0.00 27.69 20.75
Ending period, weighted average grant date fair value (in dollars per share) | $ / shares $ 25.79 $ 28.76 $ 22.61