Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 26, 2021	Dec. 31, 2020	Sep. 27, 2020
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (3,646)	$ (3,425)	$ (3,304)
Total other intangible assets, gross carrying amount	53,773	53,713	53,021
Total other intangible assets, net carrying value	50,127	50,288	49,717
License / franchise agreements
Intangible Assets, Net (Excluding Goodwill) [Abstract]
License / franchise agreements	4,262	4,259	4,257
Accumulated Amortization	(3,646)	(3,425)	(3,304)
Net Carrying Value	616	834	953
Trade names
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Carrying Amount/Value	$ 49,511	$ 49,454	$ 48,764

Indefinite And Finite Intangible Assets Gross

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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