Acquisition Table of 2014 Acquisitions (Details)	3 Months Ended									12 Months Ended
	Jan. 01, 2017 USD ($)	Oct. 02, 2016 USD ($)	Jul. 03, 2016 USD ($)	Apr. 03, 2016 USD ($)	Jan. 03, 2016 USD ($)	Sep. 27, 2015 USD ($)	Jun. 28, 2015	Mar. 29, 2015 USD ($)	Dec. 28, 2014 USD ($)	Jan. 01, 2017 USD ($)	Jan. 03, 2016 USD ($)	Dec. 28, 2014 USD ($)	Dec. 30, 2012
Business Acquisition [Line Items]
Restaurants Acquired	27	11	6	12	46	5	4			56	55	123	278
Properties purchased for sale-leaseback, number										15
Payments to Acquire Businesses, Net of Cash Acquired										$ 48,088,000	$ 52,750,000	$ 52,200,000
Proceeds from sale-leaseback transactions										$ 53,599,000	$ 9,148,000	$ 19,565,000
Acquisition-related costs	$ 800,000	$ 500,000	$ 200,000	$ 400,000	$ 800,000	$ 100,000		$ 200,000
April 30, 2014 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired												4
Payments to Acquire Businesses, Net of Cash Acquired												$ 681,000
June 30, 2014 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired												4
Properties purchased for sale-leaseback, number												1
Payments to Acquire Businesses, Net of Cash Acquired												$ 3,819,000
July 22, 2014 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired												21
Payments to Acquire Businesses, Net of Cash Acquired												$ 8,609,000
October 8, 2014 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired												30
Properties purchased for sale-leaseback, number												12
Payments to Acquire Businesses, Net of Cash Acquired												$ 20,330,000
November 4, 2014 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired												64
Payments to Acquire Businesses, Net of Cash Acquired												$ 18,761,000
Restaurants to be remodeled												46
2014 Acquisitions [Member]
Business Acquisition [Line Items]
Properties purchased for sale-leaseback, number												13
Properties sold in sale-leaseback transactions									10		1
Proceeds from sale-leaseback transactions									$ 13,000,000		$ 1,100,000
Revenue of acquired restaurants since acquisition											144,600,000	$ 34,000,000
Acquisition-related costs											$ 200,000	$ 1,900,000