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FINANCIAL INSTRUMENTS - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 31, 2019
May 31, 2018
May 31, 2019
May 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Realized gains or (losses) and changes in the estimated fair value of derivatives not designated as hedges $ (10,319) $ (84,480) $ (88,247) $ (37,698)