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, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 7,611	$ 9,663	$ (2,350)	$ 21,601
Effective income tax rate	26.10%	34.00%	(4.70%)	33.50%