Financial Derivatives (Schedule Of Derivative Instruments, Effect On Other Comprehensive Income (Loss)) (Details) (Foreign Currency Forward Contracts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012		Aug. 31, 2011		Aug. 31, 2010
Net of tax expense	$ 1,023		$ (489)		$ 181
Net Investment Hedging [Member]
Amount of Gain/(Loss) Recognized in OCI on Derivatives	$ 1,677	[1]	$ (800)	[1]	$ 296	[1]

[1] Net of tax expense (benefit) of $1,023, ($489) and $181 for the years ended August 31, 2012, 2011 and 2010, respectively.