Basis Of Presentation (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2015 USD ($)	Sep. 28, 2014	Sep. 27, 2015 USD ($)	Sep. 28, 2014	Jan. 03, 2016	Dec. 28, 2014 USD ($)
Entity Information [Line Items]
Number of Restaurants	660		660
Number of States in which Entity Operates	15		15
Weeks In Fiscal Period	13	13	39	39		52
Long-term Debt, Fair Value	$ 211,800		$ 211,800
Deferred financing fees	5,036		$ 5,036			$ 3,399
Minimum [Member]
Entity Information [Line Items]
Weeks In Fiscal Period			52
Maximum [Member]
Entity Information [Line Items]
Weeks In Fiscal Period			53
Subsequent Event [Member]
Entity Information [Line Items]
Weeks In Fiscal Period					53
Liability [Member]
Entity Information [Line Items]
Deferred financing fees	$ 4,700		$ 4,700