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Income Taxes - Additional Information (Detail)
4 Months Ended
Apr. 25, 2015
Apr. 19, 2014
Income Tax Disclosure [Abstract]    
Effective income tax rate 39.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 37.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations