Supplementary Information - Schedule of Other Expense (Income), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Supplementary Information [Abstract]
Foreign exchange loss (gain)	$ 226	$ (691)	$ 1,942	$ (723)
Interest income and other	(102)	(91)	(275)	(1,129)
Other expense (income), net	$ 124	$ (782)	$ 1,667	$ (1,852)