Derivative Instruments (Summary Of Derivatives In Cash Flow Hedging Relationships) (Details) (USD $) In Thousands	12 Months Ended
	Aug. 31, 2011	Aug. 31, 2010
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gain (Loss) Recognized in AOCLI on Derivatives (Effective Portion)	$ 5,010	$ (287)
SG&A [Member]
Derivative [Line Items]
Gain Reclassified from AOCLI to Income (Effective Portion)	$ 4,182	$ 802