System Optimization Gains, Net Summary of Disposition Activity (Details) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 01, 2023 USD ($) number_of_restaurants	Oct. 02, 2022 USD ($) number_of_restaurants	Oct. 01, 2023 USD ($) number_of_restaurants	Oct. 02, 2022 USD ($) number_of_restaurants	Jan. 01, 2017
System optimization gains, net
Company-operated restaurant ownership percentage					5.00%
Proceeds from sales of restaurants			$ 280	$ 3,731
System optimization gains, net	$ 120	$ 452	$ 119	$ 4,138
Sale of franchise-operated restaurants to franchisees
System optimization gains, net
Number of restaurants sold to franchisees \| number_of_restaurants			88	54
Sale of company-operated restaurants to franchisees
System optimization gains, net
Number of restaurants sold to franchisees \| number_of_restaurants	0	1	0	1
Proceeds from sales of restaurants	$ 0	$ 79	$ 0	$ 79
Net Assets Sold	0	(141)	0	(141)
Net unfavorable leases	0	(360)	0	(360)
Other	0	6	0	6
Gain on sales of restaurants, net, before post-closing adjustments	0	(416)	0	(416)
Post-closing adjustments on sales of restaurants	537	0	537	3,522
System optimization gains, net	537	(416)	537	3,106
Sale of other assets
System optimization gains, net
Proceeds from sales of restaurants		2,510	280	3,368
System optimization gains, net	$ (417)	868	$ (418)	1,032
Sale of manhattan company-operated restaurants to franchisees note receivable
System optimization gains, net
Proceeds from sales of restaurants		$ 126		$ 284

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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