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Business Combinations and Divestitures (Details Textuals) (USD $)
2 Months Ended 3 Months Ended
Mar. 03, 2015
Mar. 31, 2015
Apr. 01, 2014
Dec. 30, 2014
Business Acquisitions And Divestitures [Line Items]        
Disposal Group, Including Discontinued Operation, Inventory, Current   $ 1,391,000us-gaap_InventoriesPropertyHeldForSaleCurrent    
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current   52,358,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent    
Assets held for sale   53,749,000us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent   0us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
Disposal Group, Including Discontinued Operation, Deferred Rent   6,756,000pnra_DisposalGroupIncludingDiscontinuedOperationDeferredRent    
Disposal Group, Including Discontinued Operation, Asset Retirement Obligation   1,307,000pnra_DisposalGroupIncludingDiscontinuedOperationAssetRetirementObligation    
Liabilities associated with assets held for sale   8,063,000us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent   0us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down   7,600,000us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown    
Impairment of Long-Lived Assets Held-for-use   3,800,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse    
Proceeds from refranchising 3,200,000us-gaap_ProceedsFromDivestitureOfBusinesses 3,218,000us-gaap_ProceedsFromDivestitureOfBusinesses 0us-gaap_ProceedsFromDivestitureOfBusinesses  
Gain (Loss) on Disposition of Business $ 2,500,000us-gaap_GainLossOnSaleOfBusiness      
Refranchised Cafe [Domain]        
Business Acquisitions And Divestitures [Line Items]        
Number of bakery cafe   73pnra_NumberOfBakeryCafe
/ pnra_BusinessDivestitureAxis
= pnra_RefranchisedCafeDomain
   
Minimum [Member] | Refranchised Cafe [Domain]        
Business Acquisitions And Divestitures [Line Items]        
Number of bakery cafe   50pnra_NumberOfBakeryCafe
/ pnra_BusinessDivestitureAxis
= pnra_RefranchisedCafeDomain
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Maximum [Member] | Refranchised Cafe [Domain]        
Business Acquisitions And Divestitures [Line Items]        
Number of bakery cafe   150pnra_NumberOfBakeryCafe
/ pnra_BusinessDivestitureAxis
= pnra_RefranchisedCafeDomain
/ us-gaap_RangeAxis
= us-gaap_MaximumMember