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Financial Derivatives (Schedule Of Derivative Instruments, Effect On Other Comprehensive Income (Loss)) (Details) - Foreign Currency Forward Contracts [Member] - Net Investment Hedging [Member] - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Derivatives, Fair Value [Line Items]      
Foreign currency forward contracts, net of tax expense $ (204) $ (3,420) $ (53)
Tax expense $ 52 $ 2,083 $ 16