Introduction and Basis of Presentation (Details)	3 Months Ended		6 Months Ended
	Jun. 25, 2014 restaurant	Jun. 26, 2013 restaurant	Jun. 25, 2014 restaurant	Jun. 26, 2013 restaurant
Entity and franchisee unit activity [Roll Forward]
Units, end of period	1,693	1,690	1,693	1,690
Company restaurants [Member]
Entity and franchisee unit activity [Roll Forward]
Units, beginning of period	161	164	163	164
Units opened	0	0	0	0
Units acquired from franchisees	0	1	0	1
Units closed	(1)	0	(3)	0
Units, end of period	160	165	160	165
Franchised and licensed restaurants [Member]
Entity and franchisee unit activity [Roll Forward]
Units, beginning of period	1,535	1,525	1,537	1,524
Units opened	3	11	7	18
Units acquired by Company	0	(1)	0	(1)
Units closed	(5)	(10)	(11)	(16)
Units, end of period	1,533	1,525	1,533	1,525