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Earnings Per Share - Additional Information (Detail) (Stock Options [Member])	3 Months Ended
	Nov. 30, 2014	Nov. 30, 2013
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive weighted-average restricted stock awards/options excluded from the calculation of diluted earnings (loss) per share	455,581	551,584

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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