Borrowings (Details) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended					9 Months Ended		9 Months Ended
	Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012	Oct. 29, 2011	Jan. 28, 2012	Oct. 27, 2012 Amended and Restated Credit Agreement [Member] quarters	Jan. 28, 2012 Amended and Restated Credit Agreement [Member]	Jul. 28, 2011 Amended and Restated Credit Agreement [Member]	Oct. 27, 2012 Amended and Restated Credit Agreement [Member] Federal Funds Open Rate Plus 1/2 of 1% [Member] Federal Funds Open Rate [Member]	Oct. 27, 2012 Amended and Restated Credit Agreement [Member] Daily Adjusted Eurodollar Rate Plus 1.0% [Member] Daily Adjusted Eurodollar Rate [Member]	Oct. 27, 2012 Amended and Restated Credit Agreement [Member] Minimum [Member]	Oct. 27, 2012 Amended and Restated Credit Agreement [Member] Maximum [Member]	Oct. 27, 2012 Term Loan Agreement [Member] quarters	Feb. 24, 2012 Term Loan Agreement [Member]
Line of Credit Facility [Line Items]
Unsecured credit agreement amount								$ 350,000,000						$ 300,000,000
Interest period											3 months
Period following commencement of interest period						3 months
Debt instrument, basis spread on variable rate									0.50%	1.00%
Forward minimum rent commitment ratio						600.00%							600.00%
EBITDAR look back period (in consecutive fiscal quarter periods)						4							4
Percentage of facility fees accrue											0.125%	0.30%
Leverage ratio under credit facility											1	3.75
Minimum rent and contingent store rent for coverage ratio under credit facility											1	2
Borrowings	60,000,000		60,000,000		0	60,000,000	0
Interest expense, total	$ 900,000	$ 400,000	$ 2,300,000	$ 2,200,000