DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Notional Amounts of Outstanding Derivative Positions) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Thousands	May 31, 2018	Aug. 31, 2017
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 75,749	$ 75,512
Union Bank [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	35,700	35,700
Citibank [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	28,725	26,088
Scotiabank [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 11,324	$ 13,724