Leases (Schedule Of Rent Expense For Operating Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Leases [Abstract]
Minimum rentals	$ 12,441	$ 12,659	$ 12,449
Contingent rentals	284	174	161
Total rent expense	12,725	12,833	12,610
Sublease rentals	(2,372)	(2,235)	(1,905)
Net rent expense	$ 10,353	$ 10,598	$ 10,705