Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 132,656	$ 119,912	$ 292,437	$ 270,075
Term Licenses and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	72,485	57,624	166,530	142,558
Perpetual Licenses [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	10,203	9,008	22,327	20,469
Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	33,035	30,549	66,372	60,243
Professional Software Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	1,170	2,377	2,561	5,829
Software Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,376	7,481	16,437	15,579
Client Engineering Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,047	10,268	15,059	20,945
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,340	$ 2,605	$ 3,151	$ 4,452