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Acquisitions (Details 2) (USD $)
12 Months Ended 1 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Jul. 31, 2012
Sep. 30, 2012
Acquisition disclosures          
Contributions from noncontrolling interest holders $ 1,086,000us-gaap_ProceedsFromMinorityShareholders $ 950,000us-gaap_ProceedsFromMinorityShareholders $ 2,052,000us-gaap_ProceedsFromMinorityShareholders    
PJ Minnesota, LLC          
Acquisition disclosures          
Papa John's ownership interest in consolidated subsidiary 70.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
80.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
80.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
80.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
 
Third party ownership percentage in consolidated subsidiary 30.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
20.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
20.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
20.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
 
Loans receivable from a third party minority interest holder       275,000us-gaap_LoansAndLeasesReceivableRelatedParties
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
 
Contributions from noncontrolling interest holders       25,000us-gaap_ProceedsFromMinorityShareholders
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
 
Gain (loss) on transaction of forming LLC with a third party       0us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses
/ dei_LegalEntityAxis
= pzza_PJMinnesotaLLCMember
 
PJ Denver, LLC          
Acquisition disclosures          
Papa John's ownership interest in consolidated subsidiary 60.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
60.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
60.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
  60.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
Third party ownership percentage in consolidated subsidiary 40.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
40.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
40.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
  40.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
Contributions from noncontrolling interest holders         1,700,000us-gaap_ProceedsFromMinorityShareholders
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
Gain (loss) on transaction of forming LLC with a third party         0us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember
Total contributions made in consolidated subsidiary         $ 2,500,000us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationGiven1
/ dei_LegalEntityAxis
= pzza_PJDenverLLCMember