Update to Significant Accounting Policies - Noncontrolling Interest and Joint Ventures (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 28, 2020 USD ($) restaurant entity	Jun. 30, 2019 USD ($) entity restaurant	Jun. 28, 2020 USD ($) restaurant entity	Jun. 30, 2019 USD ($) entity restaurant
Noncontrolling Interests
Percentage of domestic restaurants franchised	80.00%		80.00%
Number of Joint Ventures Having Noncontrolling Interests \| entity	4	4	4	4
Joint ventures
Noncontrolling Interests
Number of Restaurants \| restaurant	192	192	192	192
Income Amounts Attributable to Noncontrolling Interest, Disclosures
Papa John's International, Inc.	$ 2,320	$ 708	$ 3,451	$ 1,172
Noncontrolling interests	1,337	322	1,887	455
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 3,657	$ 1,030	$ 5,338	$ 1,627

Represents the number of joint ventures, which includes noncontrolling interests.

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Represents the percentage of business units that are owned and/or operated in a franchise agreement by franchisees.

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Amount after tax of income (loss) from continuing operations attributable to the parent.

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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

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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.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Represents the number of restaurants.

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