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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location) (Details) - Interest Expense [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
Derivative [Line Items] |  |  |  |
Derivative, gain (loss) on derivative, Net |  | $ 5,243 | $ 5,081 | $ 5,193
Interest Rate Contract [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, gain (loss) on derivative, Net | [1] | 4,732 | 4,100 | 3,605
Interest Rate Swaps [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, gain (loss) on derivative, Net | [2] | $ 511 | $ 981 | $ 1,588
[1] | This amount is representative of the interest expense recognized on the underlying hedged transactions.
[2] | This amount is representative of the interest expense recognized on the interest rate swaps designated as cash flow hedging instruments.

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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