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Employee Benefit Plans (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Defined contribution plan recognized expenses |  | $ 4,400 | $ 3,400 | $ 3,000
Deferred compensation liability |  | $ 12,027 | 9,145 |
Maximum |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Age of employee |  | 65 years |  |
Retiree medical plan |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Deferred compensation requisite service period | 10 years | 10 years |  |
Unfunded liability |  | $ 300 | 500 |
Retiree medical plan | Minimum |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Age of employee | 50 years | 55 years |  |
Retirement age (between) | 60 years |  |  |
Deferred compensation plan |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Percentage of employee based salary permitted for deferral under the plan |  | 50.00% |  |
Percentage of employee annual bonus permitted for deferral under the plan |  | 100.00% |  |
Deferred compensation expense adjustment |  | $ 200 | $ 800 |
Deferred compensation plan assets |  | 12,300 |  |
Deferred compensation liability |  | 12,000 |  |
Deferred compensation plan | Company owned life insurance policies |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Deferred compensation plan assets |  | $ 12,300 |  |

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