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Commitments and Contingencies (Summary of Undiscounted Environmental Remediation Liability Classifications) (Details) - USD ($)
$ in Thousands
Feb. 29, 2024
Aug. 31, 2023
Feb. 28, 2023
Commitments and Contingencies Disclosure [Abstract]      
Other current liabilities $ 460 $ 1,287 $ 3,097
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 $ 9,975
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 $ 13,072