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Employee Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contributions and expenses | $ 3,390 | $ 2,992 | $ 2,726
Tranche 1 |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer percent match | 100.00% |  |
Percentage of employees' gross pay | 3.00% |  |
Tranche 2 |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer percent match | 50.00% |  |
Percentage of employees' gross pay | 2.00% |  |

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