Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic EPS:
Net income available to common shareholders	$ 2,714	$ 3,058	$ 3,002	$ 2,802	$ 2,847	$ 2,863	$ 2,768	$ 2,528	$ 2,327	$ 2,226	$ 2,183	$ 1,980	$ 11,576	$ 11,006	$ 8,716
Weighted-average common shares outstanding													3,779,582	3,752,704	3,711,490
Basic EPS	$ 0.71	$ 0.82	$ 0.79	$ 0.74	$ 0.76	$ 0.76	$ 0.74	$ 0.67	$ 0.63	$ 0.60	$ 0.59	$ 0.53	$ 3.06	$ 2.93	$ 2.35
Diluted EPS:
Net income available to common shareholders	$ 2,714	$ 3,058	$ 3,002	$ 2,802	$ 2,847	$ 2,863	$ 2,768	$ 2,528	$ 2,327	$ 2,226	$ 2,183	$ 1,980	$ 11,576	$ 11,006	$ 8,716
Weighted-average common shares outstanding													3,779,582	3,752,704	3,711,490
Potentially dilutive common shares													42,811	43,194	23,919
Weighted-average common and potentially dilutive shares outstanding													3,822,393	3,795,898	3,735,409
Diluted EPS	$ 0.71	$ 0.80	$ 0.79	$ 0.73	$ 0.75	$ 0.75	$ 0.73	$ 0.67	$ 0.61	$ 0.60	$ 0.59	$ 0.53	$ 3.03	$ 2.90	$ 2.33