Summary of Significant Accounting Policies - Schedule of Revenue Disaggregated by Revenue Type, Geographic Region and Customer (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation Of Revenue [Line Items]
Total revenue	$ 298,739	$ 264,400
Percentage of total revenue	100.00%	100.00%
Broadband/Cable/Satellite
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	52.00%	54.00%
Telecommunications
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	20.00%	19.00%
Other
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	28.00%	27.00%
Americas (principally the U.S.)
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	84.00%	84.00%
Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	12.00%	12.00%
Asia Pacific
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	4.00%	4.00%
SaaS and Related Solutions
Disaggregation Of Revenue [Line Items]
Total revenue	$ 257,876	$ 234,977
Software and Services
Disaggregation Of Revenue [Line Items]
Total revenue	30,891	18,436
Maintenance
Disaggregation Of Revenue [Line Items]
Total revenue	$ 9,972	$ 10,987