Earnings Per Share (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Basic Earnings Per Share
Net income	$ 3,237	$ 3,482	$ 4,157	$ 2,365	$ 3,338	$ 3,225	$ 3,218	$ 2,481	$ 3,661	$ 2,751	$ 2,614	$ 2,020	$ 13,241	$ 12,262	$ 11,046
Income available to common stockholders													13,241	12,262
Diluted Earnings Per Share
Income available to common stockholders and assumed conversions													$ 13,241	$ 12,262	$ 11,046
Weighted-Average Shares number of common shares, basic													7,391,681	7,374,589	7,160,700
Weighted-Average Shares, effect of dilutive securities stock option													147,157	173,296	231,131
Weighted-Average Shares income available to common stockholders and assumed conversions, diluted													7,538,838	7,547,885	7,391,831
Earnings per share, basic	$ 0.44	$ 0.48	$ 0.56	$ 0.32	$ 0.45	$ 0.44	$ 0.44	$ 0.34	$ 0.51	$ 0.38	$ 0.37	$ 0.28	$ 1.79	$ 1.66	$ 1.54
Earnings per share, diluted	$ 0.43	$ 0.47	$ 0.55	$ 0.31	$ 0.44	$ 0.43	$ 0.43	$ 0.33	$ 0.49	$ 0.37	$ 0.36	$ 0.27	$ 1.76	$ 1.62	$ 1.49