Acquisitions - Changes in Goodwill by Reportable Segment (Details) $ in Thousands	9 Months Ended
Sep. 24, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 70,616
Acquisitions	5,376
Foreign currency adjustments	19
Ending balance	76,011
UK franchisee acquisitions
Goodwill [Roll Forward]
Acquisitions	4,300
Domestic store acquisitions
Goodwill [Roll Forward]
Acquisitions	1,100
Domestic Company-owned restaurants
Goodwill [Roll Forward]
Beginning balance	55,507
Acquisitions	1,102
Foreign currency adjustments	0
Ending balance	56,609
International
Goodwill [Roll Forward]
Beginning balance	14,673
Acquisitions	4,274
Foreign currency adjustments	19
Ending balance	18,966
All others
Goodwill [Roll Forward]
Beginning balance	436
Acquisitions	0
Foreign currency adjustments	0
Ending balance	$ 436

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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