Derivatives And Risk Management (Effective Portion of Derivatives Designated as Cash Flow Hedging Instruments Reclassified from Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	$ 337	$ (578)	$ 1,018
Cost of goods sold | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	(169)	27	195
Cost of goods sold | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	20	0	0
Net sales | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	46	(826)	0
SG&A expenses [Member] | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	39	(300)	365
Interest expense | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	$ 401	$ 521	$ 458