Franchise Rights and Goodwill - Additional Information (Detail) (USD $)	6 Months Ended
Jun. 30, 2013	Jul. 01, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of the carrying value of franchise rights and goodwill	$ 0
Activity for franchise rights or goodwill	$ 0	$ 0

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

No definition available.

Name:	us-gaap_GoodwillAndIntangibleAssetImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration