Commitments and Contingencies (Summary of Undiscounted Environmental Remediation Liability Classifications) (Details) - USD ($) $ in Thousands	Nov. 30, 2021	Aug. 31, 2021	Nov. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Other current liabilities	$ 828	$ 965	$ 1,105
Other noncurrent liabilities	15,181	15,128	15,021
Total environmental remediation liabilities	$ 16,009	$ 16,093	$ 16,126

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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