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Income Per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) - shares
3 Months Ended 6 Months Ended
Oct. 18, 2015
Oct. 24, 2014
Oct. 18, 2015
Oct. 24, 2014
Service-based stock option awards [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share amount 179,018 93,873 189,535 61,640