v3.21.2

Goodwill and Intangible Assets - Narrative (Details) |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 01, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) reportingUnit operatingSegment | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2021 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 512,869,000 |  | $ 512,869,000 |  | $ 462,274,000 |
Number of operating segments | operatingSegment |  |  |  | 1 |  |  |
Number of reporting units | reportingUnit |  |  |  | 1 |  |  |
Impairment of goodwill |  |  |  | $ 0 |  | 0 |
Amortization of acquired intangibles |  | 4,483,000 | $ 4,465,000 | 13,465,000 | $ 13,447,000 |  |
Gross intangible assets |  | 257,285,000 |  | 257,285,000 |  | 243,423,000 |
ClickSWITCH |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill | $ 50,595,000 |  |  |  |  |  | $ 50,600,000
Estimated useful life | 5 years 1 month 6 days |  |  |  |  |  |
Capitalized software development costs |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross intangible assets |  | 9,010,000 |  | 9,010,000 |  | $ 5,103,000 |
Amortization of capitalized software development costs |  | 400,000 | 200,000 | 800,000 | 600,000 |  |
Cost of revenues |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Amortization of acquired intangibles |  | 5,600,000 | 5,300,000 | 16,400,000 | 16,200,000 |  |
Operating expenses |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Amortization of acquired intangibles |  | $ 4,500,000 | $ 4,500,000 | $ 13,500,000 | $ 13,400,000 |  |
Minimum |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated useful life |  |  |  | 2 years |  |  |
Minimum | ClickSWITCH |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated useful life |  |  |  | 2 years |  |  |
Minimum | Capitalized software development costs |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated useful life |  |  |  | 3 years |  |  |
Maximum |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated useful life |  |  |  | 10 years |  |  |
Maximum | ClickSWITCH |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated useful life |  |  |  | 6 years |  |  |
Maximum | Capitalized software development costs |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Estimated useful life |  |  |  | 5 years |  |  |

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