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, unless otherwise specified	3 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of income taxes, for cash flow hedges recognized in AOCI	$ (1,617)	$ 317
Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of income taxes, for cash flow hedges recognized in AOCI	(89)	14
Foreign exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of income taxes, for cash flow hedges recognized in AOCI	$ (1,528)	$ 303