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Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Sep. 30, 2022
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Debt Disclosure [Abstract] |  |
Long-term debt | $ 0 | $ 81,628
Letters of Credit Outstanding, Amount | 4,166 |
Line of Credit Facility, Remaining Borrowing Capacity | 143,396 |
Loans Payable to Bank, Noncurrent | 0 | $ 82,659
Line of Credit Facility, Maximum Borrowing Capacity | $ 150,000 |

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