DERIVATIVES AND RISK MANAGEMENT (Derivative Liabilities) (Details) - USD ($) $ in Thousands		Feb. 28, 2018	Aug. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)	[1]	$ 1,828	$ 8,510
Commodity | Not designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)		289	3,251
Foreign exchange | Designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)		671	1,549
Foreign exchange | Not designated
Derivatives, Fair Value [Line Items]
Derivative liabilities (accrued expenses and other payables)		$ 868	$ 3,710

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