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Noncontrolling Interests - Joint Ventures (Details)	Dec. 27, 2020 entity restaurant	Dec. 29, 2019 restaurant entity
Noncontrolling Interests
Number of joint ventures | entity	4	4
Joint ventures
Noncontrolling Interests
Number of Restaurants | restaurant	188	192

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of restaurants.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRestaurants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_CorporateJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: