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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Income Taxes [Abstract]
Amount computed at U.S. statutory federal tax rate	$ 19,298	$ 26,118	$ 25,476
State income taxes, net of federal tax benefits	453	327	397
Effect of foreign operations	(1,412)	(4,277)	(4,382)
Benefit from qualified domestic production deduction	(1,121)	(1,295)	(1,190)
Remeasurement of deferred income taxes	(6,762)
Toll tax	(282)
Benefit from Stock Compensation	(725)
Other	514	819	(140)
Provision for income taxes	$ 9,963	$ 21,692	$ 20,161

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