Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 159,781	$ 150,163
Term Licenses and Other, Hardware Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 700
Professional Software Services, Hardware Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		$ 1,700