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Net Earnings Per Share (Schedule Of Computation Of Basic And Diluted Net Earnings Per Share)(Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Net Earnings Per Share [Abstract]
Net earnings	$ 10,234	$ 14,728
Weighted average shares outstanding	12,889	12,756
Diluted effect of stock equivalents	62	97
Weighted average shares outstanding assuming dilution	12,951	12,853
Basic net earnings per share	$ 0.79	$ 1.15
Diluted net earnings per share	$ 0.79	$ 1.15

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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