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Earnings Loss Per Share - Additional Information (Detail)	3 Months Ended	6 Months Ended
	Oct. 27, 2012	Oct. 26, 2013	Oct. 27, 2012
Computation Of Earnings Per Share Line Items
Participating securities excluded from the calculation of earnings per share	2,846,643	2,758,721	2,886,968

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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