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Share-based Compensation (Detail 2) (RSUs, USD $)
12 Months Ended
Dec. 30, 2014
Dec. 31, 2013
Dec. 25, 2012
Share-based compensation      
Unrecognized compensation cost of unvested stock awards (in dollars) $ 9,600,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Expected weighted-average period of recognition of unrecognized compensation cost of unvested awards 10 months 24 days    
Intrinsic value of awards vested (in dollars) 20,400,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested 21,300,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested 11,600,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested
Restricted Stock Units, Shares      
Outstanding at the beginning of the period (in shares) 1,283,862us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber    
Granted (in shares) 527,965us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod    
Forfeited (in shares) (67,668)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod    
Vested (in shares) (766,035)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod    
Outstanding at the end of period (in shares) 978,124us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber 1,283,862us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber  
Restricted Stock Units, Weighted-Average Grant Date Fair Value      
Outstanding at the beginning of the period (in dollars per share) $ 18.68us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue    
Granted (in dollars per share) $ 26.74us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue    
Forfeited (in dollars per share) $ 20.09us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue    
Vested (in dollars per share) $ 19.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue    
Outstanding at the end of the period (in dollars per share) $ 22.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue $ 18.68us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue  
Weighted-Average Remaining Contractual Term (years)      
Weighted-Average Remaining Contractual Term 10 months 17 days    
Aggregate Intrinsic Value      
Outstanding at the end of the period (in dollars) $ 33,041,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding    
Minimum
     
Share-based compensation      
Vesting period 1 year    
Maximum
     
Share-based compensation      
Vesting period 5 years