Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, beginning balance	$ 1,498	$ 1,260
Increases for positions taken in current year	117	371
Increases for positions taken in prior years	43	129
Decreases for positions taken in prior years	(21)
Reduction resulting from lapse of applicable statute of limitations	(38)	(224)
Decreases for settlements with tax authorities	(200)	(38)
Unrecognized tax benefits, ending balance	$ 1,399	$ 1,498