Income Taxes (Schedule Of Provision (Benefit) For Income Taxes And Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 9,663	$ 8,122	$ 21,601	$ 20,618
Effective income tax rate	34.00%	34.60%	33.50%	34.80%