Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current income tax expense (benefit):
Federal	$ 784	$ 262	$ 340
State and local	83	94	(71)
Foreign	20,150	17,672	9,224
Total current income tax expense	21,017	18,028	9,493
Deferred income tax expense (benefit):
Federal	(2,302)	(2,490)	(1,422)
State and local	32	(1)	20
Foreign	3,119	(5,252)	8,129
Total deferred income tax expense	849	(7,743)	6,727
Total income tax expense	$ 21,866	$ 10,285	$ 16,220