Business and Summary of Significant Accounting Policies (Revenue Recognition) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Jan. 01, 2013	Jan. 03, 2012
Franchisor Disclosure [Line Items]
Percent of gift cards expected to be unredeemed (percent)	6.00%
Gift card estimated redemption period	18 months
Gift cards breakage	$ 0.2	$ 0.2	$ 0.1
Franchise [Member]
Franchisor Disclosure [Line Items]
Number of restaurants	62	51	45
Number of restaurants opened during period	11	6	2