Earnings Per Share (Computation Of EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Numerator for basic and diluted earnings per share:
Net income	$ 7,016	$ 11,116	$ 18,067
Denominator for basic and diluted earnings per share:
Basic weighted average shares outstanding	14,944	16,742	16,720
Effect of dilutive securities:
Stock options and other stock-based awards	132	181	227
Diluted weighted average shares outstanding	15,076	16,923	16,947
EPS Calculations:
Net income (loss) per share: Basic	$ 0.47	$ 0.66	$ 1.08
Net income (loss) per share: Diluted	$ 0.47	$ 0.66	$ 1.07

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Earnings Per Share Basic And Diluted Other Disclosures1 [Abstract]

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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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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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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