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Sale of Certain Company-Owned Stores - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 11, 2011 Store	Sep. 09, 2012 Store	Sep. 11, 2011 Store
Significant Acquisitions and Disposals [Line Items]
Number of remaining company-owned stores sold		6
Number of company-owned stores sold	30		56
Pre-tax gain on sale of assets, net of goodwill reduction, charged to general and administrative expense	$ 800,000		$ 1,900,000
Reduction of goodwill related to sale of stores	300,000		700,000
Other related expense	$ 315,000		$ 315,000

The charge against earnings in the period, comprised of costs incurred associated with an exit or disposal activity other than for a discontinued operations as defined under generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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