DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Notional Amounts of Outstanding Derivative Positions) (Details) € in Thousands, TTD in Thousands, $ in Thousands	May 31, 2017 TTD	May 31, 2017 EUR (€)	May 31, 2017 USD ($)	Aug. 31, 2016 USD ($)
Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount			$ 91,171	$ 62,446
Scotiabank [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount			28,358	30,188
Union Bank [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount			35,700
Union Bank [Member] | Forward Foreign Exchange Contracts [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount		€ 5,060	5,060
Citibank N.A. [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount			27,113	32,258
Costa Rica Subsidiary [Member] | Citibank N.A. [Member] | Forward Foreign Exchange Contracts [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount				$ 3,750
Colombia Subsidiary [Member] | Banco Colpatria [Member] | Forward Foreign Exchange Contracts [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount			$ 4,500
Trinidad Subsidiary [Member] | Citibank N.A. [Member] | Forward Foreign Exchange Contracts [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	TTD 5,317	€ 5,317