Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ 0	$ 0	$ 0
State	600	600	600
Foreign		100	200
Gross	600	700	800
Deferred
Federal	12,800	15,000	(121,600)
State	3,000	2,700	(13,300)
Gross	15,800	17,700	(134,900)
Total provision (benefit) for taxes	$ 16,414	$ 18,444	$ (134,137)