(3) Acquisitions and Dispositions (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended			3 Months Ended					3 Months Ended	6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jan. 01, 2012	Jul. 01, 2012 Series of Individually Immaterial Business Acquisitions [Member] Divestitures	Jun. 11, 2012 Pisces Acquisition [Member] Restaurants		Jun. 11, 2012 Pisces Acquisition [Member] Ground Lease [Member] Restaurants	Jun. 11, 2012 Pisces Acquisition [Member] Building Lease [Member] Restaurants	Apr. 01, 2012 Franchised Units [Member] stores	Jul. 03, 2011 Franchised Units [Member] stores	Jul. 03, 2011 Series of Individually Immaterial Business Acquisitions [Member] stores
Significant Acquisitions and Disposals [Line Items]
Number of Restaurants					30
Cash paid for purchase					$ 19,243
Number of restaurants with lease agreements attached					23
Number of restaurants with lease assumption							5	2
Cash					58					55
Inventory					149
Properties					12,983
Deferred taxes and other assets					1,627
Acquired territory rights					18,480
Favorable ground leases					170
Capitalized lease obligations					(14,771)
Deferred vendor incentives					(332)	[1]
Unfavorable leases					(823)
Other liabilities					(952)
Identifiable net assets					16,589
Goodwill (preliminary)	873,786		870,431		2,654	[2]			485	3,689
Consideration for acquisition before post-closing adjustments									2,594	7,673
Acquisition, cash paid	21,779	6,613								6,613
Significant changes, franchises purchased during period									2	9	2
Acquisition, note payable issued										$ 1,060
Number of restaurants divested				1

[1] Included in “Deferred income.”

[2] This goodwill is not deductible or amortizable for income tax purposes.