Income Taxes - Schedule of Components of Provision Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ (1,785)	$ 2,500	$ 0
State	(600)	621	0
Totals	(2,385)	3,121	0
Deferred:
Federal	3,554	32,378	(1,324)
State	(2,065)	815	(378)
Total income tax provision expense (benefit)	$ (896)	$ 36,314	$ (1,702)