Income Taxes - Schedule of Changes in Balance of Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020		Mar. 31, 2019
Income Tax Contingency [Line Items]
Beginning balance		$ 32,101
Decrease—Lapse of statute of limitations		(5,981)	[1]	$ (4,309)
Increases		76
Foreign currency translation	[2]	(1,767)
Ending balance		24,429
Unrecognized Tax Benefits [Member]
Income Tax Contingency [Line Items]
Beginning balance		25,998
Decrease—Lapse of statute of limitations	[1]	(4,620)
Increases		0
Foreign currency translation	[2]	(1,432)
Ending balance		19,946
Interest And Penalties [Member]
Income Tax Contingency [Line Items]
Beginning balance		6,103
Decrease—Lapse of statute of limitations	[1]	(1,361)
Increases		76
Foreign currency translation	[2]	(335)
Ending balance		$ 4,483

[1] Recorded as an income tax benefit along with an equal and offsetting amount recorded in other losses, net, to recognize a reduction in the indemnification asset. During the three months ended March 31, 2019 a $4,309 income tax benefit was recorded along with an equal and offsetting amount in other losses, net.

[2] The gross unrecognized tax benefits were accrued in British pounds sterling.