Sale and Closure of Company-Owned Stores - Additional Information (Detail) $ in Millions	12 Months Ended
Jan. 03, 2016 USD ($) Store	Dec. 28, 2014 USD ($) Store
Restructuring and Related Activities [Abstract]
Number of company-owned stores sold \| Store	4	14
Pre-tax gain on sale of assets, net of goodwill reduction, charged to general and administrative expenses	$ 0.7	$ 1.7
Reduction of goodwill related to sale of stores	$ 0.2	$ 0.5

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2443-110228

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