Acquisition Table of 2016 Acquisitions (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 30, 2018	Apr. 01, 2018	Jul. 02, 2017	Dec. 30, 2018 USD ($) restaurant	Dec. 31, 2017 USD ($)	Jan. 01, 2017 USD ($)	Dec. 30, 2012
Business Acquisition [Line Items]
Restaurants Acquired	10	1	17	44		4	278
Purchase Price				$ 38,102	$ 37,923	$ 48,088
Proceeds from sale-leaseback transactions				$ 8,424	$ 4,257	$ 53,599
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Properties purchased for sale-leaseback, number						15
Restaurants Acquired						56
Purchase Price						$ 48,088
Properties sold in sale-leaseback transactions				14
Proceeds from sale-leaseback transactions				$ 19,100
February 23, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired					12
Purchase Price					$ 7,127
May 25, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Properties purchased for sale-leaseback, number					5
Restaurants Acquired					6
Purchase Price					$ 12,080
July 14, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Properties purchased for sale-leaseback, number					3
Restaurants Acquired					4
Purchase Price					$ 5,445
August 23, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Properties purchased for sale-leaseback, number					6
Restaurants Acquired					7
Purchase Price					$ 8,755
October 4, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired					3
Purchase Price					$ 1,623
November 15, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired					17
Purchase Price					$ 7,251
December 1, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Properties purchased for sale-leaseback, number					1
Restaurants Acquired					7
Purchase Price					$ 5,807