Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 2,713	$ 3,246
Less allocation of earnings and dividends to participating securities	4	2
Net income allocated to common shareholders	$ 2,709	$ 3,244
Weighted average common shares outstanding, gross (in shares)	10,035,871	10,001,087
Less average participating securities (in shares)	15,260	6,033
Weighted average number of shares outstanding used in the calculation of basic earnings per common share (in shares)	10,020,611	9,995,054
Add dilutive effect of:
Stock options (in shares)	7,977	7,824
Stock warrants (in shares)	0	0
Adjusted weighted average number of shares outstanding used in the calculation of diluted earnings per common share (in shares)	10,028,588	10,002,878
Earnings per common share:
Basic (usd per share)	$ 0.27	$ 0.32
Diluted (usd per share)	$ 0.27	$ 0.32