Acquisition (Details) $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended	21 Months Ended
	Jan. 01, 2017 USD ($)	Oct. 02, 2016 USD ($)	Jul. 03, 2016 USD ($)	Apr. 03, 2016 USD ($)	Jan. 03, 2016 USD ($)	Sep. 27, 2015 USD ($)	Oct. 02, 2016 USD ($)	Sep. 27, 2015 USD ($)	Jan. 03, 2016 USD ($)	Oct. 02, 2016 USD ($)
Business Acquisition [Line Items]
Right of First Refusal, Number of States		20					20			20
Number of Restaurants Acquired							29		55	84
Business acquisitions, purchase price							$ 33,407	$ 1,657	$ 52,750	$ 86,157
Business acquisitions, properties purchased							14		16	30
Properties sold in sale-leaseback transactions		8					20	3
Proceeds from sale-leaseback transactions		$ 11,707					$ 29,394	$ 3,136
Restaurant sales		238,870				$ 217,676	$ 702,757	$ 629,948
Acquired Restaurants [Member]
Business Acquisition [Line Items]
Properties sold in sale-leaseback transactions							17		3
Proceeds from sale-leaseback transactions							$ 24,900		$ 4,300
Restaurant sales		$ 26,000					$ 68,300
March 31, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired						4
Business acquisitions, purchase price						$ 794
August 4, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired						5
Business acquisitions, purchase price						$ 663
October 1, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired					5
Business acquisitions, purchase price					$ 5,044
Business acquisitions, properties purchased					1
October 20, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired					1
Business acquisitions, purchase price					$ 709
November 17, 2015 Acquisition 1 [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired					2
Business acquisitions, purchase price					$ 618
November 17, 2015 Acquisition 2 [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired					6
Business acquisitions, purchase price					$ 10,945
Business acquisitions, properties purchased					5
December 1, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired					23
Business acquisitions, purchase price					$ 26,175
Business acquisitions, properties purchased					10
December 8, 2015 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired					9
Business acquisitions, purchase price					$ 7,802
February 23, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired				12
Business acquisitions, purchase price				$ 7,127
May 25, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired			6
Business acquisitions, purchase price			$ 12,080
Business acquisitions, properties purchased			5
July 14, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired		4
Business acquisitions, purchase price		$ 5,445
Business acquisitions, properties purchased		3
August 23, 2016 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired		7
Business acquisitions, purchase price		$ 8,755
Business acquisitions, properties purchased		6
Subsequent Event [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired	3
Business acquisitions, purchase price	$ 1,600
Properties sold in sale-leaseback transactions	8