Components of Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal income tax benefit:
Current	$ (1,977)	$ (1,976)	$ (3,954)
Deferred	(107,334)	(90,441)	(35,081)
Federal income tax benefit, Total	(109,311)	(92,417)	(39,035)
State income tax expense (benefit):
Current	225	851	1,704
Deferred	(17,949)	(11,593)	(11,147)
State and Local Income Tax Expense (Benefit), Continuing Operations, Total	(17,724)	(10,742)	(9,443)
Foreign income tax expense (benefit):
Current	(291)	(348)	(2,552)
Deferred		(1,168)	5,043
Foreign Income Tax Expense (Benefit), Continuing Operations, Total	(291)	(1,516)	2,491
Total income tax benefit:
Current	(2,043)	(1,473)	(4,802)
Deferred	(125,283)	(103,202)	(41,185)
Total income tax benefit:	$ (127,326)	$ (104,675)	$ (45,987)