Income Taxes - Provision Attributable to Continuing Operations to the Amount of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal income tax provision, at statutory rate	$ (5,515)	$ 6,076	$ 20,045
State and local income taxes benefit, net of federal benefit	(907)	1,322	2,693
Nondeductible expenses	295	281	7
Effect of stock-based compensation	989	87	82
Other, net	(363)	(622)	1,047
Uncertain tax positions	0	0	0
Valuation allowance	(2,796)	(6,803)	(51,357)
Effective income tax provision (benefit)	$ (8,297)	$ 341	$ (27,483)