Revenue Recognition and Accounts Receivable - Schedule of Allowance for Expected Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue Recognition [Abstract]
Allowance for expected credit losses beginning balance	$ 4,471	$ 6,364	$ 4,848	$ 3,987
Impact of adoption of ASU 2016-13				1,120
Current period provision (recovery) for expected credit losses	590	(619)	376	945
Write-offs charged against the allowance and other	(54)	(309)	(134)	(647)
Effect of changes in foreign exchange rates	(79)	88	(162)	119
Allowance for expected credit losses ending balance	$ 4,928	$ 5,524	$ 4,928	$ 5,524