Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020	Dec. 27, 2020
Segment Information
Total revenues	$ 512,782	$ 472,941	$ 1,539,536	$ 1,343,423
Operating income	38,577	24,549	130,076	70,555
Income before income taxes	34,598	20,913	118,801	59,325
Accumulated depreciation and amortization	(522,708)		(522,708)
Property and equipment, net	209,072		209,072		$ 200,895
Domestic Company-owned restaurants
Segment Information
Total revenues	191,584	178,371	584,942	526,317
North America commissary
Segment Information
Total revenues	189,224	181,338	560,743	504,379
North America commissaries
Segment Information
Total revenues	189,224	181,338	560,743	504,379
North America franchising
Segment Information
Total revenues	31,933	25,281	97,123	68,895
International
Segment Information
Total revenues	38,408	33,440	110,629	87,592
Other segment
Segment Information
Total revenues	61,633	54,511	186,099	156,240
Operating segments
Segment Information
Total revenues	512,782	472,941	1,539,536	1,343,423
Operating segments | Domestic Company-owned restaurants
Segment Information
Total revenues	191,584	178,371	584,942	526,317
Operating income	9,480	8,439	40,165	33,852
Property and equipment, gross	237,155		237,155
Operating segments | North America commissary
Segment Information
Total revenues	189,224	181,338	560,743	504,379
Operating income	9,598	8,208	29,089	24,579
Property and equipment, gross	147,186		147,186
Operating segments | North America commissaries
Segment Information
Total revenues	189,224	181,338	560,743	504,379
Operating segments | North America franchising
Segment Information
Total revenues	31,933	25,281	97,123	68,895
Operating income	29,830	23,353	90,791	62,855
Operating segments | International
Segment Information
Total revenues	46,880	40,328	135,761	106,846
Operating income	9,618	7,986	26,665	16,836
Property and equipment, gross	15,026		15,026
Operating segments | Other segment
Segment Information
Total revenues	53,161	47,623	160,967	136,986
Operating income	3,848	3,193	14,860	5,030
Property and equipment, gross	103,054		103,054
Elimination
Segment Information
Total revenues	(73,013)	(78,298)	(218,703)	(210,969)
Operating income	(639)	291	(557)	(619)
Elimination | North America commissary
Segment Information
Total revenues	(53,454)	(50,306)	(158,952)	(142,169)
Elimination | North America commissaries
Segment Information
Total revenues	(53,454)	(50,306)	(158,952)	(142,169)
Elimination | North America franchising
Segment Information
Total revenues	(1,037)	(824)	(3,138)	(2,291)
Elimination | Other segment
Segment Information
Total revenues	(18,522)	(27,168)	(56,613)	(66,509)
Unallocated corporate
Segment Information
Operating income	(23,158)	$ (26,921)	(70,937)	$ (71,978)
Property and equipment, gross	$ 229,359		$ 229,359