Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 612,701	$ 572,221	$ 532,179
Term Licenses and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	353,065	320,181	283,226
Perpetual Licenses [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	40,079	43,339	41,582
Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	148,779	135,752	122,733
Professional Software Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	8,051	7,236	6,205
Software Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	28,032	30,661	31,823
Client Engineering Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	29,497	28,883	39,282
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 5,198	$ 6,169	$ 7,328