Summary of Significant Accounting Policies - Schedule of Revenue Disaggregated by Revenue Type, Geographic Region and Customer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue:
Total revenue	$ 1,197,248	$ 1,169,258	$ 1,089,752
Percentage of total revenue	100.00%	100.00%	100.00%
Broadband/Cable/Satellite
Revenue:
Percentage of total revenue	52.00%	52.00%	54.00%
Telecommunications
Revenue:
Percentage of total revenue	18.00%	20.00%	20.00%
Other
Revenue:
Percentage of total revenue	30.00%	28.00%	26.00%
Americas (principally the U.S.)
Revenue:
Percentage of total revenue	87.00%	86.00%	85.00%
Europe, Middle East and Africa
Revenue:
Percentage of total revenue	9.00%	10.00%	11.00%
Asia Pacific
Revenue:
Percentage of total revenue	4.00%	4.00%	4.00%
SaaS and Related Solutions
Revenue:
Total revenue	$ 1,069,325	$ 1,024,572	$ 956,995
Software and Services
Revenue:
Total revenue	80,935	98,078	87,247
Maintenance
Revenue:
Total revenue	$ 46,988	$ 46,608	$ 45,510