Income Taxes - Provision (Benefit) for Current and Deferred Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 0	$ 5,520	$ 3,935
State	(575)	2,170	1,340
Foreign	78,870	68,837	95,404
Total current income tax expense	78,295	76,527	100,679
Deferred
Federal	4,264	(5,610)	(4,630)
State	(481)	68	(3,368)
Foreign	(13,429)	(15,761)	23,515
Total deferred income tax expense	(9,646)	(21,303)	15,517
Provision for income taxes	$ 68,649	$ 55,224	$ 116,196