Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
Feb. 28, 2022	Aug. 31, 2021	Feb. 28, 2021
Commitments And Contingencies [Line Items]
Liabilities	$ 320,046	$ 298,740	$ 277,624
Lindsay, Nebraska Facility [Member]
Commitments And Contingencies [Line Items]
Current environmental remediation accrual	16,100
Liabilities	$ 11,000
Liabilities discounted risk Free interest rate	1.20%
Discounted portion of liabilities	$ 12,400

Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

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+ Details