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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Derivative Assets and Liabilities at Fair Value) (Details) - Fair Value Hedging [Member] - Forward Foreign Exchange Contracts [Member] $ in Thousands	May 31, 2017 USD ($)
Union Bank [Member]
Derivative [Line Items]
Derivative Asset	$ 5,060
Derivative Liability	(5,058)
Citibank N.A. [Member] | Trinidad Subsidiary [Member]
Derivative [Line Items]
Derivative Asset	5,038
Derivative Liability	(5,346)
Other Current Assets [Member]
Derivative [Line Items]
Total Net OCI	2	[1]
Other Accrued Expenses [Member]
Derivative [Line Items]
Total Net OCI	$ (308)	[1]
[1] The net amount is included as part of the total net fair value of non-deliverable forward foreign exchange currency contracts designated as hedging instruments that do not qualify for derivative hedge accounting.

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