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Fair Value Measurements (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Executive Savings Plan assets | $ 986 | $ 783 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (852) | (657) |
Business Combination, Contingent Consideration, Liability, Noncurrent | (3,468) | (4,465) |
Equity Securities | 31,639 |  |
Debt Securities, Trading | 3,364 |  |
Equity Securities, FV-NI, Unrealized Gain (Loss) | 1,492 | 0 | $ 0
Debt Securities, Trading, Unrealized Gain (Loss) | 297 | 0 | 0
Debt and Equity Securities, Unrealized Gain (Loss) | 1,789 | 0 | 0
Fair Value, Net Asset (Liability) | 31,669 | (4,339) |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value | (3,468) | (4,465) | $ (4,323)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases | 2,790 |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) | $ 713 | $ 142 |
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Contingent consideration | Contingent consideration |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | $ (4,500) |  |
Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Executive Savings Plan assets | 986 | $ 783 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (852) | (657) |
Equity Securities | 31,639 |  |
Debt Securities, Trading | 3,364 |  |
Fair Value, Net Asset (Liability) | 35,137 | 126 |
Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Business Combination, Contingent Consideration, Liability, Noncurrent | (3,468) | (4,465) |
Fair Value, Net Asset (Liability) | $ (3,468) | $ (4,465) |

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