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Commitments and Contingencies (Summary of Undiscounted Environmental Remediation Liability Classifications) (Details) - USD ($) $ in Thousands | May 31, 2024 | Aug. 31, 2023 | May 31, 2023
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Commitments and Contingencies Disclosure [Abstract] |  |  |
Other current liabilities | $ 460 | $ 1,287 | $ 2,483
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Current | Other Liabilities, Current | Other Liabilities, Current
Other noncurrent liabilities | $ 10,172 | $ 10,175 | $ 9,817
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent
Total environmental remediation liabilities | $ 10,632 | $ 11,462 | $ 12,300

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