Derivative Financial Instruments And Hedging Activities (Impact Of Derivatives For Foreign Currency Risk And Not Designated As Hedging Instruments On Earnings) (Details) (Forward Foreign Exchange Contracts [Member], Cost Of Revenue [Member], USD $) In Thousands	12 Months Ended
	Aug. 31, 2011	Aug. 31, 2010
Forward Foreign Exchange Contracts [Member] | Cost Of Revenue [Member]
Amount of Gain (Loss) Recognized in Income on Derivative	$ (812)	$ 15,967