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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Amount of increase (decrease) 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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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of franchises sold during the period when there are significant changes in franchisor-owned outlets or franchised outlets during the period.

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Cash Proceeds from Post Closing Adjustments, Net of Payments

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Approximate Company-operated restaurant ownership percentage

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Net Assets Sold

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Post Closing Adjustments on Sales of Restaurants

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System Optimization (Gains) Losses, Net Summary of Disposition Activity (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jul. 01, 2018 USD ($)	Jun. 30, 2019 USD ($) number_of_restaurants	Jul. 01, 2018 USD ($) number_of_restaurants	Jan. 01, 2017
System optimization gains (losses), net
Company-operated restaurant ownership percentage					5.00%
System optimization gains (losses), net	$ 110	$ 92	$ 122	$ (478)
Proceeds from sales			$ 1,240	$ 1,814
Sale of Company-operated restaurants to franchisees
System optimization gains (losses), net
Significant Changes, Franchises Sold \| number_of_restaurants			0	3
System optimization gains (losses), net	0	89	$ 0	$ 89
Post closing adjustments on sales of restaurants	62	(13)	$ 54	(225)
Proceeds from sales		1,436		1,436
Net Assets Sold		1,139		1,139
Goodwill, Period Increase (Decrease)		(208)		(208)
Cash proceeds from post closing adjustments, net of payments				$ 6
Sale of franchise-operated restaurant to franchisee
System optimization gains (losses), net
Significant Changes, Franchises Sold \| number_of_restaurants			0	64
Sale of Other Assets
System optimization gains (losses), net
System optimization gains (losses), net	48	16	$ 68	$ (342)
Proceeds from sales	$ 1,240	$ 27	$ 1,240	$ 372