System Optimization (Gains) Losses, Net Summary of Disposition Activity (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Apr. 01, 2018	Jan. 01, 2017
System optimization gains (losses), net
Company-operated restaurant ownership percentage			5.00%
System optimization gains (losses), net	$ 12	$ (570)
Proceeds from sales	0	351
Sale of Company-operated restaurants to franchisees
System optimization gains (losses), net
Post closing adjustments on sales of restaurants	(8)	(212)
Cash proceeds from post closing adjustments, net of payments		6
Sale of Other Assets
System optimization gains (losses), net
System optimization gains (losses), net	$ 20	(358)
Proceeds from sales		$ 345

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

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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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Cash Proceeds from Post Closing Adjustments, Net of Payments

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Approximate Company-operated restaurant ownership percentage

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Post Closing Adjustments on Sales of Restaurants

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