DERIVATIVES AND RISK MANAGEMENT (Derivative Liabilities) (Details) - USD ($) $ in Thousands		May 31, 2017	Aug. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)	[1]	$ 2,144	$ 2,185
Commodity | Designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)		0	5
Commodity | Not designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)		238	117
Foreign exchange | Designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)		101	902
Foreign exchange | Not designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)		$ 1,805	$ 1,161

[1] Derivative assets and liabilities do not include the hedged items designated as fair value hedges.