Earnings Per Common Share (Schedule Of Reconciliation Of Net Income To Net Income Available To Common Shareholders) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 30, 2014	Nov. 30, 2013
Earnings Per Common Share [Abstract]
Net income	$ 10,786	$ 11,482
Less: Net income allocated to participating securities	(62)	(58)
Net income available to common shareholders	$ 10,724	$ 11,424