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Commitments and Contingencies (Summary of Environmental Remediation Liability Classifications) (Details) - USD ($) $ in Thousands | Aug. 31, 2022 | Aug. 31, 2021
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Commitments and Contingencies Disclosure [Abstract] |  |
Other current liabilities | $ 4,179 | $ 965
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Current | Other Liabilities, Current
Other noncurrent liabilities | $ 10,967 | $ 15,128
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent
Total environmental remediation liabilities | $ 15,146 | $ 16,093

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