Segment Information - Schedule of Segment Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Mar. 28, 2022 restaurant	Sep. 24, 2023 USD ($)	Sep. 25, 2022 USD ($)	Sep. 24, 2023 USD ($)	Sep. 25, 2022 USD ($) restaurant	Dec. 25, 2022 USD ($)
Segment Reporting Information [Line Items]
Total revenues		$ 522,812	$ 510,512	$ 1,564,391	$ 1,575,869
Total operating income		31,868	19,461	104,576	72,800
Accumulated depreciation and amortization		(561,592)		(561,592)
Total property and equipment, net		268,087		268,087		$ 249,793
Refranchising loss					8,400
Non-cash reserves		0	905	0	$ 12,065
Corporate Joint Venture | Disposal group, disposed of by sale, not discontinued operations
Segment Reporting Information [Line Items]
Number of restaurants divested | restaurant	90				90
Domestic Company-owned restaurants
Segment Reporting Information [Line Items]
Total revenues		177,195	166,050	532,841	$ 536,226
North America franchising
Segment Reporting Information [Line Items]
Total revenues		35,041	33,712	105,824	102,897
North America commissaries
Segment Reporting Information [Line Items]
Total revenues		204,887	216,115	624,433	645,177
International
Segment Reporting Information [Line Items]
Total revenues		42,927	30,735	108,998	97,310
All others
Segment Reporting Information [Line Items]
Total revenues		62,762	63,900	192,295	194,259
Operating segments
Segment Reporting Information [Line Items]
Total revenues		522,812	510,512	1,564,391	1,575,869
Operating segments | Domestic Company-owned restaurants
Segment Reporting Information [Line Items]
Total revenues		177,195	166,050	532,841	536,226
Total operating income		6,147	3,667	19,438	11,579
Property and equipment, gross		249,211		249,211
Operating segments | North America franchising
Segment Reporting Information [Line Items]
Total revenues		35,041	33,712	105,824	102,897
Total operating income		32,234	31,464	97,745	96,225
Operating segments | North America commissaries
Segment Reporting Information [Line Items]
Total revenues		204,887	216,115	624,433	645,177
Total operating income		10,691	8,425	31,818	28,717
Property and equipment, gross		157,056		157,056
Operating segments | International
Segment Reporting Information [Line Items]
Total revenues		48,481	37,707	128,539	119,696
Total operating income		2,270	1,136	13,265	12,897
Property and equipment, gross		29,403		29,403
UK re-positioning and transaction costs related to acquisitions		1,200		2,500
Charge related to the reserve of certain accounts and notes receivable and operating lease right-of-use assets impairment			4,100		4,100
Operating segments | International | Accounts Receivable
Segment Reporting Information [Line Items]
Non-cash reserves			3,500		3,500
Operating segments | All others
Segment Reporting Information [Line Items]
Total revenues		57,208	56,928	172,754	171,873
Total operating income		2,379	2,037	6,879	7,943
Property and equipment, gross		142,905		142,905
Eliminations
Segment Reporting Information [Line Items]
Total revenues		(68,457)	(67,888)	(207,120)	(216,518)
Total operating income		(1,061)	416	(710)	(423)
Eliminations | North America franchising
Segment Reporting Information [Line Items]
Total revenues		(1,040)	(996)	(3,117)	(3,097)
Eliminations | North America commissaries
Segment Reporting Information [Line Items]
Total revenues		(51,237)	(51,330)	(154,640)	(162,591)
Eliminations | International
Segment Reporting Information [Line Items]
Total revenues		0	0	0	0
Eliminations | All others
Segment Reporting Information [Line Items]
Total revenues		(16,180)	(15,562)	(49,363)	(50,830)
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Total operating income		(20,792)	(27,684)	(63,859)	(84,138)
Property and equipment, gross		251,104		251,104
Severance and related costs				2,000
Legal settlements		$ 600	$ 10,000	$ 600	15,000
Advisory fees and severance costs					1,500
Unallocated corporate expenses | Notes Receivable
Segment Reporting Information [Line Items]
Non-cash reserves					$ 13,900