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Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 28, 2025	Sep. 29, 2024
Disaggregation of Revenue [Line Items]
Total revenues	$ 316,022	$ 251,609	$ 906,149	$ 752,619
Restaurant sales
Disaggregation of Revenue [Line Items]
Total revenues	313,636	248,965	898,210	743,730
In-restaurant dining sales
Disaggregation of Revenue [Line Items]
Total revenues	254,155	207,047	728,282	613,422
Third-party delivery sales
Disaggregation of Revenue [Line Items]
Total revenues	37,163	22,372	103,633	72,682
Take-out sales
Disaggregation of Revenue [Line Items]
Total revenues	22,318	19,546	66,295	57,626
Franchise revenues
Disaggregation of Revenue [Line Items]
Total revenues	2,386	2,644	7,939	8,889
Royalty and system fund contributions
Disaggregation of Revenue [Line Items]
Total revenues	2,333	2,587	7,371	8,257
Initial fees
Disaggregation of Revenue [Line Items]
Total revenues	53	57	170	219
Business combinations - revenues recognized
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ 398	$ 413

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