Financial Derivatives (Schedule Of Derivative Instruments, Effect On Other Comprehensive Income (Loss)) (Details) - Foreign Currency Forward Contracts [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts, net of tax expense (benefit) of $544, ($744), $271, and ($181)	$ 1,404	$ (1,213)	$ 480	$ (477)
Tax expense (benefit)	$ 544	$ (744)	$ 271	$ (181)