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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024
Income Tax Disclosure [Line Items] |  |  |
Provision (benefit) for income taxes | $ 10,922 | $ 19,212 |
Unrecognized tax benefits | 43,400 |  | $ 65,000
Income tax provision upon recognition of unrecognized tax benefit | 43,400 |  |
Unrecognized tax benefits, increase in valuation allowance upon recognition | 6,300 |  |
Potential decrease in unrecognized tax benefits | 5,000 |  |
Foreign Tax Jurisdiction [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Provision (benefit) for income taxes | $ 5,400 | $ 3,600 |

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