Summary of Significant Accounting Policies - Schedule of Revenue Disaggregated by Revenue Type, Geographic Region and Customer (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation Of Revenue [Line Items]
Total revenue	$ 290,318	$ 286,327	$ 585,453	$ 585,066
Percentage of total revenue	100.00%	100.00%	100.00%	100.00%
Broadband/Cable/Satellite
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	53.00%	54.00%	52.00%	53.00%
Telecommunications
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	16.00%	18.00%	17.00%	19.00%
Other
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	31.00%	28.00%	31.00%	28.00%
Americas (principally the U.S.)
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	89.00%	87.00%	87.00%	85.00%
Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	6.00%	9.00%	8.00%	11.00%
Asia Pacific
Disaggregation Of Revenue [Line Items]
Percentage of total revenue	5.00%	4.00%	5.00%	4.00%
SaaS and Related Solutions
Disaggregation Of Revenue [Line Items]
Total revenue	$ 262,658	$ 255,600	$ 524,353	$ 513,476
Software and Services
Disaggregation Of Revenue [Line Items]
Total revenue	14,681	18,766	37,075	49,657
Maintenance
Disaggregation Of Revenue [Line Items]
Total revenue	$ 12,979	$ 11,961	$ 24,025	$ 21,933