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Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Income Taxes [Abstract]
Unrecognized tax benefits - Beginning of fiscal year	$ 981	$ 1,239
Net increases (decreases) - prior period tax positions	62
Net increases (decreases) - prior period tax positions		(68)
Net increases - current period tax positions	263	228
Expirations of statute of limitations for assessment	(197)	(382)
Settlements	(71)	(36)
Unrecognized tax benefits - End of fiscal year	$ 1,038	$ 981

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Amount of unrecognized tax benefits.

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