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Net Earnings Per Share (Narrative) (Details)	3 Months Ended		9 Months Ended
Net Earnings Per Share (Narrative) (Details)	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Net Earnings Per Share [Abstract]
Options excluded from the diluted net earnings per share calculation	1,814,149	855,242	869,490	877,802

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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