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Derivative Financial Instruments and Hedging Activities - Fair Value of Commodity Derivative Instruments (Details) - USD ($)
$ in Thousands
May 31, 2022
Aug. 31, 2021
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability $ 625,117 $ 453,367
Derivative Asset, Fair Value, Gross Asset 890,516 568,749
Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability 54,150 1,001
Derivative Asset, Fair Value, Gross Asset $ 19,596 $ 11,874