Acquisition Table of 2017 Acquisitions (Details) $ in Thousands				3 Months Ended						12 Months Ended
	Nov. 28, 2017 USD ($)	Jun. 05, 2017 USD ($)	Feb. 28, 2017 USD ($)	Dec. 31, 2017	Jul. 02, 2017	Apr. 02, 2017	Oct. 02, 2016	Jul. 03, 2016	Jan. 03, 2016	Dec. 31, 2017 USD ($)	Jan. 01, 2017 USD ($)	Jan. 03, 2016 USD ($)	Dec. 30, 2012
Business Acquisition [Line Items]
Restaurants Acquired				4	17	43	11	6	27	64	56	55	278
Purchase Price										$ 37,923	$ 48,088	$ 52,750
February 28, 2017 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired			43
Purchase Price			$ 20,366
June 5, 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Restaurants Acquired		17
Purchase Price		$ 16,355
November 28, 2017 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired	4
Purchase Price	$ 1,202