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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Income Taxes [Abstract]
Amount computed at U.S. statutory federal tax rate	$ 15,858	$ 16,962	$ 19,298
State income taxes, net of federal tax benefits	853	963	453
Effect of foreign operations	297	318	(1,412)
Benefit from qualified domestic production deduction			(1,121)
Net benefit from GILTI/FDII	(1,582)	(1,404)
Remeasurement of deferred income taxes			(6,762)
Toll tax, net of foreign tax credits		8,665	(282)
Benefit from stock compensation	(1,129)	(1,107)	(725)
Other	508	465	514
Provision for income taxes	$ 14,805	$ 24,862	$ 9,963

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