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DERIVATIVES (Derivatives Not Designated as Hedging Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivatives accounted for as cash flow hedging instruments	$ 12,145	$ (5,143)	$ 21,032	$ (8,075)
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivatives accounted for as cash flow hedging instruments	12,200	(5,200)	21,000	(8,100)
Commodity | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before income taxes for derivatives not designated as hedges	$ (7,900)	$ 1,500	$ (24,500)	$ 1,900

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109998890-113959

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-Topic 815
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-Section 50
-Paragraph 4C
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-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580

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