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, 2012	Aug. 31, 2011	Aug. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	$ (578)	$ 1,018	$ 370
Cost of goods sold [Member] | Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	27	195	(7)
Net sales [Member] | Foreign exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	(826)	0	0
SG&A expenses [Member] | Foreign exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	(300)	365	(81)
Interest expense [Member] | Interest rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss), net of taxes for cash flow hedges reclassified from AOCI	$ 521	$ 458	$ 458