Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic EPS
Net income	$ 8,073	$ 5,710	$ 15,799	$ 11,493
Weighted average shares outstanding	27,640,921	27,337,403	27,610,061	27,309,237
Basic earnings per share	$ 0.29	$ 0.21	$ 0.57	$ 0.42
Diluted EPS
Net income	$ 8,073	$ 5,710	$ 15,799	$ 11,493
Weighted average shares outstanding	27,640,921	27,337,403	27,610,061	27,309,237
Dilutive effect of restricted stock awards	338,068	57,273	339,159	61,440
Weighted average shares for diluted earnings per share	27,978,989	27,394,676	27,949,220	27,370,677
Diluted earnings per share	$ 0.29	$ 0.21	$ 0.57	$ 0.42