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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Notional Amounts of Outstanding Derivative Positions) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Thousands | Aug. 31, 2017 | Aug. 31, 2016
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Derivative [Line Items] |  |
Derivative Liability, Notional Amount | $ 75,512 | $ 62,446
Union Bank [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Notional Amount | 35,700 |
Citibank [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Notional Amount | 26,088 | 30,188
Scotiabank [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Notional Amount | $ 13,724 | $ 32,258

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