Components of Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal income tax benefit:
Current	$ (1,976)	$ (3,954)	$ (42)
Deferred	(90,441)	(35,081)	(335,106)
Federal income tax benefit, Total	(92,417)	(39,035)	(335,148)
State income tax expense (benefit):
Current	851	1,704	(215)
Deferred	(11,593)	(11,147)	4,511
State and Local Income Tax Expense (Benefit), Continuing Operations, Total	(10,742)	(9,443)	4,296
Foreign income tax expense (benefit):
Current	(348)	(2,552)	(3,108)
Deferred	(1,168)	5,043	249
Foreign Income Tax Expense (Benefit), Continuing Operations, Total	(1,516)	2,491	(2,859)
Total income tax benefit:
Current	(1,473)	(4,802)	(3,365)
Deferred	(103,202)	(41,185)	(330,346)
Total income tax benefit:	$ (104,675)	$ (45,987)	$ (333,711)