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General - Additional Information (Detail) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 26, 2013	Oct. 27, 2012	Oct. 26, 2013	Oct. 27, 2012
Stock Options
Summary Of Significant Accounting Policies [Line Items]
Securities excluded from calculation of diluted earnings per share	75	421	75	421
Unvested restricted stock award
Summary Of Significant Accounting Policies [Line Items]
Unvested restricted stock award	0	0	0	0

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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