Basis Of Presentation Narrative (Details)	3 Months Ended	12 Months Ended
	Jan. 03, 2016 USD ($)	Jan. 03, 2016 USD ($)	Dec. 28, 2014	Dec. 29, 2013 USD ($)	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014
Entity Information [Line Items]
Number of restaurants	705	705	674		660	657	659	581	560	560
Number of states	16	16
Weeks In fiscal period	14	53	52	52
Franchise Term Renewal Period		20 years
Franchise Agreement, Term		20 years
Cash, FDIC Insured Amount	$ 250,000	$ 250,000
Number of Reportable Segments		1
Distribution of Net Assets, Spin-Off				$ (688,000)
Administrative Costs, Fees for Services under Transition Services Agreement				$ 3,400,000
Minimum [Member]
Entity Information [Line Items]
Weeks In fiscal period		52
Maximum [Member]
Entity Information [Line Items]
Weeks In fiscal period		53