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Significant Accounting Policies - Noncontrolling Interests (Details) | Dec. 31, 2017 item
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Noncontrolling Interests |
Number of joint ventures | 5

X
- Definition Represents the number of joint ventures, which includes noncontrolling interests. + References No definition available. + Details
Name: | pzza_NumberOfJointVenturesHavingNoncontrollingInterests
Namespace Prefix: | pzza_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_NoncontrollingInterestAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration