Income Taxes (Schedule Of Provision (Benefit) For Income Taxes And Effective Income Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Income Taxes [Abstract]
Provision for income taxes	$ 8,689	$ 8,184	$ 14,576	$ 12,389
Effective income tax rate	34.10%	35.60%	33.40%	33.60%