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Contingencies - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Sep. 30, 2024
Loss Contingencies [Line Items] |  |
Standard product warranty length, minimum | 1 year |
Standard product warranty length, maximum | 2 years |
Limited product warranty length (up to) | 10 years |
Accrued amounts for litigation and other contingent liabilities | $ 9,147 | $ 9,297
Performance Bonds |  |
Loss Contingencies [Line Items] |  |
Letters of credit secured using cash collateral | 39,300 |
Outstanding performance bonds | $ 324,000 |

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