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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2023	Aug. 31, 2023	Nov. 30, 2022
Commitments And Contingencies [Line Items]
Liabilities	$ 297,058	$ 290,009	$ 303,508
Lindsay, Nebraska Facility [Member]
Commitments And Contingencies [Line Items]
Current environmental remediation accrual	10,700
Liabilities	$ 8,000
Liabilities discounted risk Free interest rate	1.20%
Discounted portion of liabilities	$ 9,000

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