Income Taxes - Schedule of (Benefits from) Provision for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal		$ (364)	$ (10,168)
State and local	$ 704	(2,279)	(346)
Total current provision (benefit)	704	(2,643)	(10,514)
Federal	(16,247)	(126,465)	13,445
State and local	(1,007)	(18,346)	805
Total deferred (benefit) provision	(17,254)	(144,811)	14,250
Total (benefit from) provision for income taxes	$ (16,550)	$ (147,454)	$ 3,736