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Summary of Significant Accounting Policies - Schedule of Revenue Disaggregated by Revenue Type, Geographic Region and Customer (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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