Income Taxes (Schedule Of Provision (Benefit) For Income Taxes And Effective Income Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Income Taxes [Abstract]
Provision for income taxes	$ 2,002	$ 669	$ 5,887	$ 4,205
Effective income tax rate	32.80%	15.80%	32.30%	30.20%