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, 2024	Mar. 31, 2023
Disaggregation Of Revenue [Line Items]
Total revenue	$ 295,135	$ 298,739
Percentage of total revenue	100.00%	100.00%
Broadband/Cable/Satellite
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	51.00%	52.00%
Telecommunications
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	19.00%	20.00%
Other
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	30.00%	28.00%
Americas (principally the U.S.)
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	86.00%	84.00%
Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	9.00%	12.00%
Asia Pacific
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	5.00%	4.00%
SaaS and Related Solutions
Disaggregation Of Revenue [Line Items]
Total revenue	$ 261,695	$ 257,876
Software and Services
Disaggregation Of Revenue [Line Items]
Total revenue	22,394	30,891
Maintenance
Disaggregation Of Revenue [Line Items]
Total revenue	$ 11,046	$ 9,972