Derivative Financial Instruments And Hedging Activities (Fair Value Of Assets And Liabilities Related To Foreign Forward Exchange Contracts Measured On Recurring Basis) (Details) (USD $) In Thousands	Aug. 31, 2011
Forward foreign exchange contracts, Fair Value Assets	$ 6,342
Forward foreign exchange contracts, Fair Value Liabilities	(6,777)
Fair Value Assets and Liabilities, Total	(435)
Level 1 [Member]
Forward foreign exchange contracts, Fair Value Assets
Forward foreign exchange contracts, Fair Value Liabilities
Fair Value Assets and Liabilities, Total
Level 2 [Member]
Forward foreign exchange contracts, Fair Value Assets	6,342
Forward foreign exchange contracts, Fair Value Liabilities	(6,777)
Fair Value Assets and Liabilities, Total	(435)
Level 3 [Member]
Forward foreign exchange contracts, Fair Value Assets
Forward foreign exchange contracts, Fair Value Liabilities
Fair Value Assets and Liabilities, Total