Basis of Presentation and Summary of Significant Accounting Policies - Advertising Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Accounting Policies [Abstract]
Revenue collected for advertising fund (as a percent)	5.50%	5.30%
Franchisor Disclosure [Line Items]
Cash and cash equivalents	$ 196,572	$ 315,910
Accounts receivable, net	20,823	19,661
Accounts payable	12,846	6,943
Cost of Sales
Franchisor Disclosure [Line Items]
Advertising expenses	7,200	6,300	$ 4,900
Ad Funds
Franchisor Disclosure [Line Items]
Cash and cash equivalents	5,900	23,700
Accounts receivable, net	10,200	9,000
Accrued expenses	10,200	15,300
Accounts payable	$ 5,900	$ 17,300

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