Earning Per Common Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator for basic and diluted earnings per common share:
Net income	$ 4,971	$ 3,222	$ 7,889	$ 3,824
Denominator:
Weighted average shares outstanding (shares)	10,365	10,341	10,361	10,332
Denominator for basic earnings per common share (shares)	10,365	10,341	10,361	10,332
Effect of dilutive securities:
Other stock compensation plans (shares)	124	138	120	103
Dilutive potential common shares (shares)	124	138	120	103
Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions (shares)	10,489	10,479	10,481	10,435
Basic earnings per common share (usd per share)	$ 0.48	$ 0.31	$ 0.76	$ 0.37
Diluted earnings per common share (usd per share)	$ 0.47	$ 0.31	$ 0.75	$ 0.37