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Business Combinations - Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Oct. 01, 2021 | Sep. 30, 2024 | Sep. 30, 2023
Business Acquisition [Line Items] |  |  |
Goodwill, Acquired During Period |  | $ 23,684 | $ 29,396
Fiscal Year 2024 Acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Goodwill, Acquired During Period |  | $ 23,600 |
Lilac Cloud, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Goodwill, Acquired During Period |  |  | $ 29,400
Threat Stack, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Total Purchase Price | $ 68,900 |  |
Identifiable Intangible Assets Useful Life | 5 years |  |
Developed Technology Rights | Threat Stack, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable Intangible Assets Useful Life | 5 years |  |
Customer Relationships | Threat Stack, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable Intangible Assets Useful Life | 5 years |  |

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