Income Taxes - Components of Provision for (Benefit from) Income Taxes (Detail) - USD ($) $ in Thousands			12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax expense (benefit):
Federal			$ 11,552	$ 3,918	$ (2,132)
State			5,387	205	142
Foreign			7,722	11,967	13,562
Total current tax expense (benefit)			24,661	16,090	11,572
Deferred tax (benefit) expense:
Federal			90	1,350	(1,231)
State			560	444	300
Foreign			(19,901)	(6,878)	303
Total deferred tax (benefit) expense			(19,251)	(5,084)	(628)
Provision for (benefit from) income taxes	$ (14,800)	$ (9,200)	$ 5,410	$ 11,006	$ 10,944