Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020	Dec. 27, 2020
Segment Information
Total revenues	$ 515,008	$ 460,623	$ 1,026,754	$ 870,482
Operating income	44,637	30,534	91,499	46,006
Income before income taxes	40,988	26,907	84,203	38,412
Accumulated depreciation and amortization	(513,614)		(513,614)
Property and equipment, net	198,818		198,818		$ 200,895
Domestic Company-owned restaurants
Segment Information
Total revenues	196,124	186,506	393,358	347,946
North America commissary
Segment Information
Total revenues	186,641	167,619	371,519	323,041
North America commissaries
Segment Information
Total revenues	186,641	167,619	371,519	323,041
North America franchising
Segment Information
Total revenues	32,475	24,174	65,190	43,614
International
Segment Information
Total revenues	37,614	28,093	72,221	54,152
Other segment
Segment Information
Total revenues	62,154	54,231	124,466	101,729
Operating segments
Segment Information
Total revenues	515,008	460,623	1,026,754	870,482
Operating segments | Domestic Company-owned restaurants
Segment Information
Total revenues	196,124	186,506	393,358	347,946
Operating income	15,361	16,746	30,685	25,413
Property and equipment, gross	234,022		234,022
Operating segments | North America commissary
Segment Information
Total revenues	186,641	167,619	371,519	323,041
Operating income	9,778	8,711	19,491	16,371
Property and equipment, gross	146,040		146,040
Operating segments | North America commissaries
Segment Information
Total revenues	186,641	167,619	371,519	323,041
Operating segments | North America franchising
Segment Information
Total revenues	32,475	24,174	65,190	43,614
Operating income	30,518	22,176	60,961	39,502
Operating segments | International
Segment Information
Total revenues	46,277	34,366	88,881	66,518
Operating income	8,683	4,471	17,047	8,849
Property and equipment, gross	14,657		14,657
Operating segments | Other segment
Segment Information
Total revenues	53,491	47,958	107,806	89,363
Operating income	4,894	2,035	11,012	1,838
Property and equipment, gross	97,086		97,086
Elimination
Segment Information
Total revenues	(73,412)	(66,536)	(145,690)	(132,671)
Operating income	20	(724)	82	(910)
Elimination | North America commissary
Segment Information
Total revenues	(53,428)	(47,357)	(105,498)	(91,863)
Elimination | North America commissaries
Segment Information
Total revenues	(53,428)	(47,357)	(105,498)	(91,863)
Elimination | North America franchising
Segment Information
Total revenues	(1,041)	(793)	(2,101)	(1,467)
Elimination | Other segment
Segment Information
Total revenues	(18,943)	(18,386)	(38,091)	(39,341)
Unallocated corporate
Segment Information
Operating income	(24,617)	$ (22,881)	(47,779)	$ (45,057)
Property and equipment, gross	$ 220,627		$ 220,627