Asset Impairments - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 29, 2013 Store	Sep. 30, 2012 Store	Sep. 29, 2013 Store	Sep. 30, 2012 Store
Goodwill and Intangible Assets Disclosure [Abstract]
Asset impairment charge	$ 537,000	$ 818,000	$ 763,000	$ 3,541,000
Number of stores impaired	1	2	2	12
Number Of Stores Previously Impaired	1	1	1	7
Number of stores discontinued to operate			1
Carrying value of impaired assets	$ 900,000	$ 4,500,000	$ 900,000	$ 4,500,000
Average discount rate			7.00%
Average sales growth rate			0.00%
Average cash flow margin			0.12