Basis Of Presentation (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	9 Months Ended		3 Months Ended	0 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Dec. 29, 2013	Sep. 28, 2014 Minimum [Member]	Sep. 28, 2014 Maximum [Member]	Dec. 28, 2014 Subsequent Event [Member]	Oct. 08, 2014 October 8, 2014 Acquisition [Member] Subsequent Event [Member]	Nov. 04, 2014 November 4, 2014 Acquisition [Member] Subsequent Event [Member]
Entity Information [Line Items]
Weeks In Fiscal Period	13	13	39	39	52	52	53
Number of Restaurants	581		581
Number of States in which Entity Operates	13		13
Long-term Debt, Fair Value	$ 163,500,000		$ 163,500,000
Impairment Charges	400,000	1,100,000	1,000,000	2,300,000
Business Acquisition, Effective Date of Acquisition									Oct. 08, 2014	Nov. 04, 2014
Number of Restaurants Acquired								94	30	64
Acquisition of restaurants, net of cash acquired			$ 13,021,000	$ 0					$ 20,500,000	$ 18,000,000
Number of Real Estate Properties									12