Acquisitions and Purchase Accounting (Details 1)	9 Months Ended
Sep. 25, 2012
Weighted average amortization period for all intangible assets
Weighted average amortization period	41 years
Franchise rights [Member]
Weighted average amortization period for all intangible assets
Weighted average amortization period	41 years
Favorable leasehold interests [Member]
Weighted average amortization period for all intangible assets
Weighted average amortization period	15 years
Unfavorable leasehold interests [Member]
Weighted average amortization period for all intangible assets
Weighted average amortization period	9 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration