Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic EPS
Net income	$ 8,084	$ 5,983	$ 23,883	$ 17,476
Weighted average shares outstanding	27,695,105	27,654,020	27,638,721	27,436,931
Basic earnings per share	$ 0.29	$ 0.22	$ 0.86	$ 0.64
Diluted EPS
Net income	$ 8,084	$ 5,983	$ 23,883	$ 17,476
Weighted average shares outstanding	27,695,105	27,654,020	27,638,721	27,436,931
Dilutive effect of restricted stock awards	306,863	43,890	305,410	55,454
Weighted average shares for diluted earnings per share	28,001,968	27,697,910	27,944,131	27,492,385
Diluted earnings per share	$ 0.29	$ 0.22	$ 0.85	$ 0.64