Derivative Financial Instruments And Hedging Activities (Fair Value Of Derivative Instruments Located On Consolidated Balance Sheets) (Details) (Forward Foreign Exchange Contracts [Member], USD $) In Thousands	Aug. 31, 2011	Aug. 31, 2010
Derivatives Designated As Hedging Instruments [Member] | Prepaid Expenses And Other Current Assets [Member]
Forward foreign exchange contracts, Asset Derivatives	$ 2,825	$ 669
Derivatives Designated As Hedging Instruments [Member] | Other Accrued Expense [Member]
Forward foreign exchange contracts, Liability Derivatives	2,798	1,046
Derivatives Not Designated As Hedging Instruments [Member] | Prepaid Expenses And Other Current Assets [Member]
Forward foreign exchange contracts, Asset Derivatives	3,517	4,814
Derivatives Not Designated As Hedging Instruments [Member] | Other Accrued Expense [Member]
Forward foreign exchange contracts, Liability Derivatives	$ 3,979	$ 3,268