Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Diluted Earnings Per share
Net income available to common shareholders	$ 4,494	$ 3,114	$ 13,691	$ 12,575
Weighted average shares outstanding (in shares)	12,208,313	10,984,141	12,183,363	10,969,633
Effect of dilutive stock options (in shares)	116,941	108,533	132,487	98,412
Weighted average shares of common stock and common stock equivalents (in shares)	12,325,254	11,092,674	12,315,850	11,068,045
Diluted earnings per share (in dollars per share)	$ 0.36	$ 0.28	$ 1.11	$ 1.14
Anti-dilutive options and restricted stock awards (in shares)	0	45,800	0	54,650