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Income Taxes - Provision (Benefit) for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal									$ 11	$ 67	$ 46
State									(96)	(381)	11
Total Current									(85)	(314)	57
Deferred:
Federal									1,415	(50,084)	(46,926)
State									410	9,639	4,913
Total Deferred									1,825	(40,445)	(42,013)
Provision (benefit) for income taxes	$ (764)	$ 2,426	$ (4,324)	$ 922	$ 30,018	$ 6,698	$ 2,761	$ 1,282	$ 1,740	$ (40,759)	$ (41,956)

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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