Commitments and Contingencies (Summary of Undiscounted Environmental Remediation Liability Classifications) (Details) - USD ($) $ in Thousands	Feb. 28, 2022	Aug. 31, 2021	Feb. 28, 2021
Commitments and Contingencies Disclosure [Abstract]
Other current liabilities	$ 777	$ 965	$ 1,105
Other noncurrent liabilities	15,155	15,128	15,017
Total environmental remediation liabilities	$ 15,932	$ 16,093	$ 16,122

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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