Sale of Company-Owned Stores - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 23, 2014 Store
Restructuring And Related Activities [Abstract]
Number of company-owned stores sold	14
Pre-tax gain on sale of assets, net of goodwill reduction, charged to general and administrative expenses	$ 1.7
Reduction of goodwill related to sale of stores	0.5
Deferred tax valuation allowance	$ 0.3

Amount of gain (loss) on sale or disposal of other assets.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration