DERIVATIVES AND RISK MANAGEMENT (Derivative Assets) (Details) - USD ($) $ in Thousands		Feb. 28, 2018	Aug. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative assets (other current assets)	[1]	$ 4,857	$ 2,134
Commodity | Not designated
Derivatives, Fair Value [Line Items]
Derivative assets (other current assets)		1,070	767
Foreign exchange | Designated
Derivatives, Fair Value [Line Items]
Derivative assets (other current assets)		936	81
Foreign exchange | Not designated
Derivatives, Fair Value [Line Items]
Derivative assets (other current assets)		$ 2,851	$ 1,286

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