Net Income per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 4,173	$ 3,518	$ 12,276	$ 10,068
Weighted average shares issued (in shares)	16,953,744	16,902,218	16,950,474	16,897,524
Add: dilutive effect of stock options (in shares)	36,418	51,835	31,145	35,953
Weighted average shares outstanding adjusted for potential dilution (in shares)	16,990,162	16,954,053	16,981,619	16,933,477
Basic earnings per share (in dollars per share)	$ 0.25	$ 0.21	$ 0.72	$ 0.60
Diluted earnings per share (in dollars per share)	$ 0.25	$ 0.21	$ 0.72	$ 0.59
Anti-dilutive stock options excluded from earnings per share calculation (in shares)	60,000	30,000	60,000	103,000