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Supporting Financial Information - Interest Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |
Interest expense | $ 3,821 | $ 4,160 | $ 7,831 | $ 5,714
Interest income | (28) |  |  |
Interest income |  | 0 | (23) | 0
Amortization of deferred financing costs | 397 | 605 | 1,040 | 881
Interest expense | $ 4,190 | $ 4,765 | $ 8,848 | $ 6,595

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