Acquisition Table of 2015 Acquisitions (Details) $ in Thousands	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 ($)	Jan. 01, 2017 USD ($)	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
Payments to Acquire Businesses, Net of Cash Acquired									$ 48,088	$ 52,750	$ 52,200
Properties purchased for sale-leaseback, number									15
Proceeds from sale-leaseback transactions									$ 53,599	9,148	19,565
Land and building	$ 19,387				$ 22,614				$ 19,387	$ 22,614	$ 15,955
Acquisition-related costs	$ 800	$ 500	$ 200	$ 400	$ 800	$ 100		$ 200
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Properties sold in sale-leaseback transactions									14
Proceeds from sale-leaseback transactions									$ 19,100
Revenue of acquired restaurants since acquisition									28,600
Acquisition-related costs									$ 1,600
2015 Acquisitions [Member]
Business Acquisition [Line Items]
Properties purchased for sale-leaseback, number										16
Properties sold in sale-leaseback transactions					3				12
Proceeds from sale-leaseback transactions					$ 4,300				$ 17,700
Revenue of acquired restaurants since acquisition									70,400	$ 12,900
Acquisition-related costs									$ 200	$ 1,000
March 31, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired										4
Payments to Acquire Businesses, Net of Cash Acquired										$ 794
August 4, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired										5
Payments to Acquire Businesses, Net of Cash Acquired										$ 663
October 1, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired										5
Payments to Acquire Businesses, Net of Cash Acquired										$ 5,044
Properties purchased for sale-leaseback, number										1
October 20, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired										1
Payments to Acquire Businesses, Net of Cash Acquired										$ 709
November 17, 2015 Acquisition 1 [Member]
Business Acquisition [Line Items]
Restaurants Acquired										2
Payments to Acquire Businesses, Net of Cash Acquired										$ 618
November 17, 2015 Acquisition 2 [Member]
Business Acquisition [Line Items]
Restaurants Acquired										6
Payments to Acquire Businesses, Net of Cash Acquired										$ 10,945
Properties purchased for sale-leaseback, number										5
December 1, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired										23
Payments to Acquire Businesses, Net of Cash Acquired										$ 26,175
Properties purchased for sale-leaseback, number										10
December 8, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Restaurants Acquired										9
Payments to Acquire Businesses, Net of Cash Acquired										$ 7,802