Acquisitions and Dispositions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended																							12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011	Dec. 30, 2012 Sale of Company-Owned Restaurants to Franchiees [Member] stores	Jan. 01, 2012 Sale of Company-Owned Restaurants to Franchiees [Member] stores	Jan. 02, 2011 Sale of Company-Owned Restaurants to Franchiees [Member] stores	Jan. 01, 2012 Property, Plant and Equipment [Member]	Jan. 02, 2011 Property, Plant and Equipment [Member]	Dec. 30, 2012 Sale of Restaurant to Unrelated Third Party [Member]	Dec. 30, 2012 Franchisees Exercising Options to Purchase Previously Subleased Properties [Member]	Dec. 30, 2012 Surplus Properties [Member]	Jan. 01, 2012 Surplus Properties [Member]	Jan. 02, 2011 Surplus Properties [Member]	Dec. 30, 2012 Other Dispositions [Member]	Jan. 01, 2012 Other Dispositions [Member]	Jan. 02, 2011 Other Dispositions [Member]	Jun. 11, 2012 Pisces Acquisition [Member] years stores Restaurants		Jun. 11, 2012 Pisces Acquisition [Member] Ground Lease [Member] Restaurants	Jun. 11, 2012 Pisces Acquisition [Member] Building Lease [Member] Restaurants	Jul. 13, 2012 Double Cheese Acquisition [Member] years stores		Jul. 13, 2012 Double Cheese Acquisition [Member] Building Lease [Member] Restaurants	Dec. 30, 2012 Franchised Units [Member] stores	Jan. 01, 2012 Franchised Units [Member] stores	Dec. 30, 2012 Depreciation and Amortization [Member]	Jan. 02, 2011 Depreciation and Amortization [Member]
Significant Acquisitions and Disposals [Line Items]
Number of Restaurants																	30				24
Consideration for acquisition before post-closing adjustments																	$ 18,915				$ 19,181
Number of restaurants with lease agreements attached																	23
Number of restaurants with lease assumption																			5	2			12
Cash																	55				27				66
Inventories																	149				163
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment																	12,485				12,753
Deferred taxes and other assets																	1,773
Other assets																					190
Acquired territory rights																	18,390	[1]			2,640	[1]
Favorable ground leases																	222				1,147
Capitalized lease obligations																	(14,394)				(948)
Deferred vendor incentives																	(382)	[2]			(248)	[2]
Unfavorable leases																	(992)				(531)
Other liabilities																	(952)				(727)
Total identifiable net assets																	16,354				14,466
Weighted average amortization period, acquired territory rights																	13				13
Goodwill (preliminary)	876,201	870,431	883,644														2,561	[3]			4,715	[3]		485	5,620
Significant Changes, Franchises Assumed During Period																									4
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed																									2,689
Business Combination, Bargain Purchase, Gain Recognized, Amount																									1,659
Acquisition, cash paid	40,608	11,210	3,123																						11,210
Significant changes, franchises purchased during period																								2	19
Business Acquisition, Cost of Acquired Entity, Purchase Price																								2,594	12,270
Acquisition, note payable issued																									1,060
Significant Changes, Franchises Sold				30	5	2
Proceeds from Sale of Property, Plant, and Equipment	21,023	6,113	3,405	14,059	3,275	821	1,075	1,231	1,874	3,550	941	909	1,123	599	854	230
Gain (Loss) on Sale of Property Plant Equipment		$ 885																								$ (22)	$ 1,411

[1] The acquired territory rights have a weighted average amortization period of 13 years.

[2] Included in “Other liabilities.”

[3] Goodwill is partially amortizable for income tax purposes.