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Earnings Per Share - Shares excluded from Diluted Earnings per share Computations (Details) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Shares excluded from the diluted earnings per share computations
Shares excluded from the calculation of diluted earnings per share	69	704

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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