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Debt - Debt Acquired in Acquisition (Details) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 12 Months Ended
Sep. 16, 2008
Dec. 28, 2014
Dec. 29, 2013
Debt Instrument [Line Items]      
Carrying Amount   $ 664.0us-gaap_LongTermDebt $ 644.3us-gaap_LongTermDebt
10-year term loan      
Debt Instrument [Line Items]      
Maturity period 10 years    
Carrying Amount   3.8us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember		  
Quarterly installment payment - principal   $ 0.3us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember		  
Basis spread on variable rate   1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember