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Supporting Financial Information - Interest Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Interest expense | $ 15,352 | $ 14,153
Interest income | (38) | (64)
Amortization of deferred financing costs | 1,839 | 2,182
Interest expense | $ 17,153 | $ 16,271

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