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Supplemental Cash Flow Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
4 Months Ended
Apr. 25, 2015
Apr. 19, 2014
Supplemental Cash Flow Elements [Abstract]    
Restricted stock issuance $ 8.3us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures $ 6.9us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
Capital expenditures recorded in current liabilities $ 2.0us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1 $ 1.8us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1