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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		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Weighted-average shares:
Basic weighted-average common shares outstanding	38,579	37,118	39,803	34,138
Total weighted-average shares	38,641	37,118	39,863	34,138
Earnings per common share—Basic
Net income	$ 9,831	$ 5,036	$ 27,831	$ 13,446
Net income available to common shareholders—Basic	$ 9,815	$ 5,036	$ 27,789	$ 13,446
Net income per common share—Basic	$ 0.25	$ 0.14	$ 0.70	$ 0.39
Basic weighted-average common shares outstanding	38,579	37,118	39,803	34,138
Effect of diluted shares	750	505	734	227
Diluted weighted-average shares outstanding	39,329	37,623	40,537	34,365
Net income per common share—Diluted	$ 0.25	$ 0.13	$ 0.69	$ 0.39
RSAs
Weighted-average shares:
Basic weighted-average common shares outstanding	62	0	60	0
Earnings per common share—Basic
Less: Undistributed earnings allocated to RSAs	$ 16	$ 0	$ 42	$ 0
Basic weighted-average common shares outstanding	62	0	60	0
Common Stock
Weighted-average shares:
Basic weighted-average common shares outstanding	38,579	37,118	39,803	34,138
Earnings per common share—Basic
Basic weighted-average common shares outstanding	38,579	37,118	39,803	34,138

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