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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended
May 31, 2024
Aug. 31, 2023
May 31, 2023
Commitments And Contingencies [Line Items]      
Liabilities $ 278,105 $ 290,009 $ 286,822
Lindsay, Nebraska Facility [Member]      
Commitments And Contingencies [Line Items]      
Current environmental remediation accrual 10,600    
Liabilities $ 8,000    
Liabilities discounted risk Free interest rate 1.20%    
Discounted portion of liabilities $ 9,000