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v3.23.3

Employee Benefit Plans (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Defined contribution plan recognized expenses |  | $ 3.4 | $ 3.0 | $ 2.9
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 |  | $ 0.5 | 0.4 |
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 |  | $ 0.8 | $ 0.3 |
Deferred compensation plan assets |  | 9.1 |  |
Deferred compensation liability |  | 9.1 |  |
Deferred compensation plan | Company owned life insurance policies |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Deferred compensation plan assets |  | $ 9.1 |  |

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