Selected Quarterly Financial and Earnings Data (Unaudited) (Details) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 29, 2019 USD ($)	Sep. 29, 2019 USD ($)	Jun. 30, 2019 USD ($) restaurant	Mar. 31, 2019 USD ($)	Dec. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Dec. 29, 2019 USD ($) restaurant	Dec. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Quarterly Financial Information Disclosure [Abstract]
Restaurants Acquired			233		10			1	44
Acquisition-related costs	$ 2,800	$ 2,800	$ 2,600	$ 2,600	$ 400	$ 800	$ 100	$ 100
Impairment and other lease charges	$ 1,800	$ 500	$ 400	$ 900	$ 300	$ 200	$ 2,900	$ 300	$ 3,564	$ 3,685	$ 2,827
Number of Restaurants	1,101	1,088	1,081	845	849	838	807	807	1,101	849

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460

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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

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Represents the number of restaurants.

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- References

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- Definition

Amount of restructuring charges, remediation cost, and asset impairment loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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