Basis of Presentation - Schedule of Basic and Diluted Earnings Per Common Share (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
Basic earnings per share calculation:
Net income	$ 8,388	$ 1,207	$ 29,380	$ 31,581
Weighted-average basic shares outstanding	30,004,952	18,259,128	26,649,942	17,542,335
Basic earnings per share	$ 0.28	$ 0.07	$ 1.10	$ 1.80
Diluted earnings per share:
Net income	$ 8,388	$ 1,207	$ 29,380	$ 31,581
Weighted-average basic shares outstanding	30,004,952	18,259,128	26,649,942	17,542,335
Average diluted common shares outstanding	599,585	73,064	548,431	24,532
Weighted-average diluted shares outstanding	30,604,537	18,332,192	27,198,373	17,566,867
Diluted earnings per share	$ 0.27	$ 0.07	$ 1.08	$ 1.80
Pro forma earnings per share:
Pro forma net income	$ 8,388	$ 10,033	$ 29,380	$ 30,412
Weighted-average basic shares outstanding	30,004,952	18,259,128	26,649,942	17,542,335
Pro forma basic earnings per share	$ 0.28	$ 0.55	$ 1.10	$ 1.73
Pro forma diluted earnings per share:
Pro forma net income	$ 8,388	$ 10,033	$ 29,380	$ 30,412
Weighted-average diluted shares outstanding	30,604,537	18,332,192	27,198,373	17,566,867
Pro forma diluted earnings per share	$ 0.27	$ 0.55	$ 1.08	$ 1.73