Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 17,846	$ 56,834	$ 27,805
State	3,336	7,507	(577)
Foreign	24,385	20,650	6,327
Current income tax provision	45,567	84,991	33,555
Deferred:
Federal	25,887	(118,919)	42,964
State	3,382	4,413	3,445
Foreign	(5,529)	(463)	(1,398)
Deferred income tax provision (benefit)	23,740	(114,969)	45,011
Provision (benefit) for income taxes	$ 69,307	$ (29,978)	$ 78,566