Earnings Per Share - Basic and Diluted (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	$ 5,963	$ 4,324	$ 19,815	$ 11,670
Weighted average basic common shares outstanding (in shares)	13,955,859	12,718,861	13,949,325	12,049,151
Effect of dilutive stock options (in shares)	97,573	98,695	89,089	94,687
Weighted average dilutive shares outstanding (in shares)	14,053,432	12,817,556	14,038,414	12,143,838
Basic earnings per common share (in dollars per share)	$ 0.43	$ 0.34	$ 1.42	$ 0.97
Diluted earnings per common share (in dollars per share)	$ 0.42	$ 0.34	$ 1.41	$ 0.96