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Income Taxes - Provisions (Benefit) for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 46	$ (4,655)	$ (1,831)
State	11	(429)	706
Total Current	57	(5,084)	(1,125)
Deferred:
Federal	(46,926)	(25,958)	5,159
State	4,913	(1,478)	217
Total Deferred	(42,013)	(27,436)	5,376
Provisions (benefit) for income taxes	$ (41,956)	$ (32,520)	$ 4,251

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