Net Income Per Share - Schedule of Reconciliation of Denominators and Additional Shares that are Excluded from the Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Weighted-average shares:
Basic weighted-average common shares outstanding	40,669	32,625
Total weighted-average shares	40,728	32,625
Earnings per common share—Basic
Net income	$ 8,447	$ 3,448
Net income available to common shareholders—Basic	$ 8,435	$ 3,448
Net income per common share—Basic	$ 0.21	$ 0.11
Basic weighted-average common shares outstanding	40,669	32,625
Effect of diluted shares	839	0
Diluted weighted-average shares outstanding	41,508	32,625
Net income per common share—Diluted	$ 0.20	$ 0.11
RSAs
Weighted-average shares:
Basic weighted-average common shares outstanding	59	0
Earnings per common share—Basic
Less: Undistributed earnings allocated to RSAs	$ 12	$ 0
Basic weighted-average common shares outstanding	59	0
Common Stock
Weighted-average shares:
Basic weighted-average common shares outstanding	40,669	32,625
Earnings per common share—Basic
Basic weighted-average common shares outstanding	40,669	32,625