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Net Earnings Per Share (Schedule Of Computation Of Basic And Diluted Net Earnings Per Share)(Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
Net Earnings Per Share [Abstract]
Net earnings	$ 6,944	$ 7,568
Weighted average shares outstanding	11,259	12,224
Diluted effect of stock awards	29	50
Weighted average shares outstanding assuming dilution	11,288	12,274
Basic net earnings per share	$ 0.62	$ 0.62
Diluted net earnings per share	$ 0.62	$ 0.62

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