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Acquisitions (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands | Nov. 01, 2021 | Mar. 31, 2022 | Sep. 30, 2021
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 341,645 | $ 225,522
Ventus |  |  |
Business Acquisition [Line Items] |  |  |
Cash | $ 350,000 |  |
Fair value of net tangible assets acquired | 22,110 |  |
Goodwill | 116,890 |  |
Total assets acquired and liabilities assumed | 350,000 |  |
Customer Relationships | Ventus |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets | 179,000 |  |
Trademarks | Ventus |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets | 16,000 |  |
Technology-Based Intangible Assets | Ventus |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets | $ 16,000 |  |

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