Deferred Revenue and Advance Payments (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Deferred Revenue Disclosure [Abstract]
Deferred product licenses revenue, Current	$ 442	$ 993
Deferred subscription services revenue, Current	38,272	35,589
Deferred product support revenue, Current	123,203	166,477
Deferred other services revenue, Current	4,017	6,801
Total current deferred revenue and advance payments	165,934	209,860
Deferred product licenses revenue, Non-current	70	68
Deferred subscription services revenue, Non-current	2,943	1,064
Deferred product support revenue, Non-current	5,172	6,203
Deferred other services revenue, Non-current	569	754
Total non-current deferred revenue and advance payments	$ 8,754	$ 8,089