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Commitments and Contingencies (Summary of Environmental Remediation Liability Classifications) (Details) - USD ($) $ in Thousands | Aug. 31, 2023 | Aug. 31, 2022
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Commitments and Contingencies Disclosure [Abstract] |  |
Other current liabilities | $ 1,287 | $ 4,179
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Current | Other Liabilities, Current
Other noncurrent liabilities | $ 10,175 | $ 10,967
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent
Total environmental remediation liabilities | $ 11,462 | $ 15,146

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