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Segment Information - Concentration (Details)	9 Months Ended
	Sep. 27, 2020 entity segment
Major customers disclosures
Number of reportable segments | segment	4
Consolidated revenues
Major customers disclosures
Concentration risk, number | entity	0

X

- Definition

For an entity that discloses a concentration risk in relation to a quantitative amount, this concept represents the number of customers exceeding the threshold percentage.

+ References

No definition available.

+ Details

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

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: