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Earnings Per Common Share - Additional Information (Detail)	9 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock options, unvested restricted stock and restricted stock units outstanding	25,290	20,318

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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