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Commitments and Contingencies - Schedule of Environmental Liabilities (Details)
$ in Thousands
9 Months Ended
May 31, 2020
USD ($)
Aug. 31, 2019
USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]    
Beginning Balance $ 51,799  
Liabilities Established (Released), Net 5,462  
Payments and Other (3,251)  
Ending Balance 54,010  
Short-Term 6,009 $ 6,030
Long-Term $ 48,001 $ 45,769