DERIVATIVES AND RISK MANAGEMENT (Derivative Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014		Aug. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)	$ 1,503	[1]	$ 3,567	[1]
Commodity | Designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)	6		129
Commodity | Not designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)	162		1,268
Foreign exchange | Designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)	325		432
Foreign exchange | Not designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)	$ 1,010		$ 1,738

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