Acquisitions and Dispositions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended				3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 30, 2012	Mar. 31, 2013 Franchised Units [Member] stores	Apr. 01, 2012 Franchised Units [Member] stores	Jan. 01, 2012 Franchised Units [Member]	Jun. 11, 2012 Pisces Acquisition [Member] stores	Mar. 31, 2013 Depreciation and Amortization [Member]	Mar. 31, 2013 Surplus Properties [Member]
Significant Acquisitions and Disposals [Line Items]
Significant Changes, Franchises Purchased During Period				1	2
Number of Restaurants							30
Business Acquisition, Cost of Acquired Entity, Cash Paid							$ 18,915
Payments to Acquire Businesses, Net of Cash Acquired	0	2,594			2,594
Goodwill	875,179		876,201			485
Proceeds from Sale of Property, Plant, and Equipment									2,104
Gain (Loss) on Sale of Property Plant Equipment								$ 564