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Stock-Based Incentive Plans (Allocation of Share Based Compensation Costs by Type of Arrangement) (Details) - USD ($)
3 Months Ended 6 Months Ended
Oct. 18, 2015
Oct. 24, 2014
Oct. 18, 2015
Oct. 24, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense $ 15,679,748 $ 2,682,449 $ 18,787,886 $ 6,194,892
Service-based stock option awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 7,190,997 1,023,850 8,404,658 2,224,874
Service-based restricted stock and restricted stock unit awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 6,282,160 1,504,512 7,634,429 3,223,627
Performance-based restricted stock and restricted stock unit awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense $ 2,206,591 $ 154,087 $ 2,748,799 $ 746,391