Income Taxes - Summary of Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 9,635	$ 17,015	$ 37,495
Foreign	64,740	64,756	104,196
State	5,367	5,672	8,918
Current income tax expense	79,742	87,443	150,609
Deferred:
Federal	(26,123)	(57,953)	(68,486)
Foreign	(20,548)	(11,662)	(28,100)
State	(2,576)	(1,860)	(4,292)
Deferred income tax benefit	(49,247)	(71,475)	(100,878)
Total income tax expense	$ 30,495	$ 15,968	$ 49,731