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Litigation, Commitments and Contingencies (Details 4) (USD $)
 12 Months Ended
Dec. 28, 2014
item
Capital lease related to Industrial Revenue Bonds  
Loss Contingency Information About Litigation Matters  
Investments in Industrial Revenue Bonds $ 80,200,000pzza_InvestmentsInIndustrialRevenueBonds
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
Investments in Industrial Revenue Bonds, percent owned 100.00%pzza_InvestmentsInIndustrialRevenueBondsPercentOwned
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
Domestic Restaurants  
Loss Contingency Information About Litigation Matters  
Number of lease agreements the company is contingently liable 20pzza_NumberOfLeaseAgreements
/ us-gaap_StatementGeographicalAxis
= pzza_DomesticRestaurantSitesMember
Potential amount of undiscounted payments under the lease arrangements 724,000us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_StatementGeographicalAxis
= pzza_DomesticRestaurantSitesMember
United Kingdom Subsidiary  
Loss Contingency Information About Litigation Matters  
Number of lease agreements the company is contingently liable 25pzza_NumberOfLeaseAgreements
/ us-gaap_StatementGeographicalAxis
= pzza_UnitedKingdomRestaurantSitesMember
Potential amount of undiscounted payments under the lease arrangements $ 420,000us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_StatementGeographicalAxis
= pzza_UnitedKingdomRestaurantSitesMember