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Summary of Significant Accounting Policies - Schedule of Revenue Disaggregated by Revenue Type, Geographic Region and Customer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation Of Revenue [Line Items]
Total revenue	$ 303,615	$ 295,143	$ 900,196	$ 880,596
Percentage of total revenue	100.00%	100.00%	100.00%	100.00%
Broadband/Cable/Satellite
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	51.00%	53.00%	51.00%	52.00%
Telecommunications
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	18.00%	18.00%	18.00%	18.00%
Other
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	31.00%	29.00%	31.00%	30.00%
Americas (principally the U.S.)
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	85.00%	88.00%	86.00%	88.00%
Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	10.00%	9.00%	10.00%	8.00%
Asia Pacific
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	5.00%	3.00%	4.00%	4.00%
SaaS and Related Solutions
Disaggregation Of Revenue [Line Items]
Total revenue	$ 274,965	$ 263,701	$ 814,453	$ 788,054
Software and Services
Disaggregation Of Revenue [Line Items]
Total revenue	16,804	19,705	51,717	56,780
Maintenance
Disaggregation Of Revenue [Line Items]
Total revenue	$ 11,846	$ 11,737	$ 34,026	$ 35,762

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