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v3.25.1

Long-Term Debt and Lines of Credit - Schedule of interest costs expensed and capitalized (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Debt Disclosure [Abstract] |  |  |  |
Interest expense | $ 1,159 | $ 663 | $ 2,057 | $ 2,268
Interest capitalized | 27 | 292 | 328 | 595
Total | $ 1,186 | $ 955 | $ 2,385 | $ 2,863

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