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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, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ 286,868 | $ 273,308 | $ 871,934 | $ 799,876
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% | 55.00% | 53.00% | 55.00%
Telecommunications |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Percentage of total revenue | 20.00% | 20.00% | 20.00% | 19.00%
Other |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Percentage of total revenue | 27.00% | 25.00% | 27.00% | 26.00%
Americas (principally the U.S.) |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Percentage of total revenue | 86.00% | 86.00% | 86.00% | 85.00%
Europe, Middle East and Africa |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Percentage of total revenue | 9.00% | 10.00% | 10.00% | 11.00%
Asia Pacific |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Percentage of total revenue | 5.00% | 4.00% | 4.00% | 4.00%
SaaS and Related Solutions |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ 250,777 | $ 238,614 | $ 764,253 | $ 704,303
Software and Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | 23,578 | 23,123 | 73,235 | 61,627
Maintenance |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | $ 12,513 | $ 11,571 | $ 34,446 | $ 33,946

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