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Earnings Per Common Share (Schedule Of Weighted Average Number Of Shares) (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012
Earnings Per Common Share [Abstract]
Weighted-average common shares outstanding, basic	15,460	15,872	15,579	15,966
Weighted-average dilutive securities	101	136	103	128
Weighted-average common shares outstanding, diluted	15,561	16,008	15,682	16,094

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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