Acquisitions and Dispositions Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended				3 Months Ended		12 Months Ended
	Jun. 11, 2012 stores Restaurants		Jul. 13, 2012 stores		Dec. 28, 2014 stores	Jun. 29, 2014 stores	Dec. 28, 2014 stores	Dec. 29, 2013 stores	Dec. 30, 2012 stores
Business Acquisition [Line Items]
Goodwill					$ 822,562		$ 822,562	$ 842,544	$ 876,201
Pisces Acquisition [Member]
Business Acquisition [Line Items]
Significant Changes, Franchises Purchased During Period	30
Number of Restaurants with Lease Agreements Attached	23
Significant Acquisitions and Disposals, Acquisition Costs	18,915
Cash	55
Inventories	149
Properties	12,485
Deferred taxes and other assets	1,773
Acquired territory rights	18,390	[1]
Favorable ground leases	222
Capitalized lease obligations	(14,394)
Deferred vendor incentives	(382)
Unfavorable leases	(992)
Other liabilities	(952)
Total identifiable net assets	16,354
Goodwill	2,561	[2]
Acquired territory rights, weighted average amortization period	13 years
Pisces Acquisition [Member] | Ground Lease [Member]
Business Acquisition [Line Items]
Number of Restaurants with Lease Assumption	5
Pisces Acquisition [Member] | Building Lease [Member]
Business Acquisition [Line Items]
Number of Restaurants with Lease Assumption	2
Double Cheese Acquisition [Member]
Business Acquisition [Line Items]
Significant Changes, Franchises Purchased During Period			24
Significant Acquisitions and Disposals, Acquisition Costs			19,181
Cash			27
Inventories			163
Properties			12,753
Deferred taxes and other assets			190
Acquired territory rights			2,640	[3]
Favorable ground leases			1,147
Capitalized lease obligations			(948)
Deferred vendor incentives			(248)
Unfavorable leases			(531)
Other liabilities			(727)
Total identifiable net assets			14,466
Goodwill			4,715	[4]
Acquired territory rights, weighted average amortization period			13 years
Double Cheese Acquisition [Member] | Building Lease [Member]
Business Acquisition [Line Items]
Number of Restaurants with Lease Assumption			12
Acquisitions [Member]
Business Acquisition [Line Items]
Significant Changes, Franchises Purchased During Period					18	3	45	1	2
Intangible assets					0		0
Significant Acquisitions and Disposals, Acquisition Costs					53,954		53,954		2,594
Properties					19,857		19,857
Acquired territory rights					6,650		6,650
Goodwill					0		0
Goodwill, Period Increase (Decrease)							11,455		485
Acquisitions [Member] | Other operating expense, net [Member]
Business Acquisition [Line Items]
Business Combination, Bargain Purchase, Gain Recognized, Amount							$ 349

[1] The acquired territory rights had a weighted average amortization period of 13 years. Due to the subsequent sale of this territory, we accelerated the amortization through the date of sale.

[2] This goodwill was not deductible or amortizable for income tax purposes. In addition, the goodwill was disposed of as a result of the subsequent sale of this territory.

[3] The acquired territory rights had a weighted average amortization period of 13 years. Due to the sale of this territory, we accelerated the amortization through the date of sale.

[4] This goodwill was partially amortizable for income tax purposes. In addition, the goodwill was disposed of as a result of the subsequent sale of this territory.