Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended		12 Months Ended
	Feb. 02, 2013	Feb. 01, 2011	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011	Dec. 31, 2006
Commitments and Contingencies [Line Items]
Store lease term	5 years
Extension of lease term						5 years
Occupancy costs, automobile and leased equipment expense			$ 54.9	$ 53.0	$ 52.8
Lease agreement term						20 years
Sale leaseback transaction rent expense						4.6
Sale leaseback transaction deferred gain						29.3
Leased asset amortization period						20 years
Operating leases renewal option, number of successive lease periods						6
Percentage of increase in annual rent on base rate		7.00%
Current annual rent			4.9
Amortization of deferred gain			$ 1.5
Minimum
Commitments and Contingencies [Line Items]
Extension of lease term	5 years
Maximum
Commitments and Contingencies [Line Items]
Extension of lease term	10 years