DERIVATIVES AND RISK MANAGEMENT (Effective Portion of Derivatives Designated as Cash Flow Hedging Instruments Recognized in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain, (loss), net of taxes for effective portion of derivatives designated as cash flow hedging instruments recognized in AOCI	$ 756	$ 1,618	$ (2,467)
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Gain, (loss), net of taxes for effective portion of derivatives designated as cash flow hedging instruments recognized in AOCI	210	(204)	(635)
Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain, (loss), net of taxes for effective portion of derivatives designated as cash flow hedging instruments recognized in AOCI	$ 546	$ 1,822	$ (1,832)