Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Goodwill
Goodwill, Beginning Balance	$ 80,791	$ 80,340
Foreign currency adjustments	(159)	451
Goodwill, Ending Balance	80,632	80,791
Domestic Company-owned Restaurants
Goodwill
Goodwill, Beginning Balance	64,254	64,254
Goodwill, Ending Balance	64,254	64,254
International
Goodwill
Goodwill, Beginning Balance	16,101	15,650
Foreign currency adjustments	(159)	451
Goodwill, Ending Balance	15,942	16,101
Goodwill, accumulated impairment	2,300	2,300	$ 2,300
All others
Goodwill
Goodwill, Beginning Balance	436	436
Goodwill, Ending Balance	$ 436	$ 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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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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