Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Basic EPS
Net income	$ 5,235	$ 5,983	$ 5,710	$ 5,783	$ 5,363	$ 5,376	$ 5,020	$ 4,798	$ 22,711	$ 20,557	$ 8,055
Weighted average shares outstanding									27,567,909	27,180,230	22,678,338
Basic earnings per share									$ 0.82	$ 0.76	$ 0.36
Diluted EPS
Net income	$ 5,235	$ 5,983	$ 5,710	$ 5,783	$ 5,363	$ 5,376	$ 5,020	$ 4,798	$ 22,711	$ 20,557	$ 8,055
Weighted average shares outstanding									27,567,909	27,180,230	22,678,338
Average unvested restricted stock awards									51,167	29,108	5,232
Weighted average shares for diluted earnings per share									27,619,076	27,209,338	22,683,570
Diluted earnings per share									$ 0.82	$ 0.76	$ 0.36