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Earnings Per Common Share (Schedule Of Weighted Average Number Of Shares) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Earnings Per Common Share [Abstract]
Weighted-average common shares outstanding, basic	15,517	15,914	16,803
Weighted-average dilutive securities	102	132	179
Weighted-average common shares outstanding, diluted	15,619	16,046	16,982

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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