DERIVATIVES (Derivatives Not Designated as Hedging Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivatives accounted for as cash flow hedging instruments	$ 7,723	$ (3,646)	$ 8,887	$ (2,932)
Commodity | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	$ (11,000)	$ 1,700	$ (16,600)	$ 400