Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 30, 2012 Store	Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Schedule Of Income Taxes [Line Items]
Likelihood of benefit being realized upon settlement	Greater than 50 percent
Unrecognized tax benefits, interest on income taxes expense	$ 100,000	$ 100,000	$ 300,000
Unrecognized tax benefits	3,472,000	3,487,000	4,405,000	6,789,000
Unrecognized tax benefits that would impact effective tax rate	2,100,000	2,200,000	3,000,000
Unrecognized tax benefits, interest on income taxes accrued	500,000	400,000	500,000
Tax benefit to reflect increased tax basis in certain assets due to issuance of final tax regulations	700,000
Number of remaining company-owned stores sold	6
Deferred tax asset, valuation allowance	900,000
Release Of Accrual
Schedule Of Income Taxes [Line Items]
Unrecognized tax benefits, interest on income taxes expense			700,000
Unrecognized tax benefits, income tax penalties accrued			400,000
Unrecognized tax benefits, interest on income taxes accrued		$ 200,000