Operating (Gains), Losses and Other Charges, Net - (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 27, 2023	Dec. 28, 2022	Dec. 29, 2021
Finite-Lived Intangible Assets [Line Items]
Accrued severance and other restructuring charges	$ 1,400	$ 700
Asset impairment charges	2,214	963	$ 442
Tangible asset impairment charges	1,300	600	300
Operating lease, impairment loss	900	300	100
Impairment related to finance lease ROU assets	100	$ 100	$ 100
Reacquired franchise rights
Finite-Lived Intangible Assets [Line Items]
Impairment of franchisee rights	$ 100

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of impairment loss from right-of-use asset from finance lease.

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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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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Amount of loss from impairment of right-of-use asset from operating lease.

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Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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