Income Taxes - Components of Income Tax Benefit from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ (94)	$ 6,318
State	75	936
Total current income tax benefit	(19)	7,254
Deferred:
Federal		(11,323)
State		(2,033)
Total deferred income tax benefit (expense)		(13,356)
Total income tax benefit (expense)	$ (19)	$ (6,102)