Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended					6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jan. 28, 2012 Reversal of deferred tax valuation allowance	Jul. 28, 2012 Federal	Jul. 28, 2012 State and Local Jurisdiction	Jul. 28, 2012 Federal And State Jurisdiction
Income Taxes [Line Items]
Deferred tax assets, total	$ 50.4
Deferred tax assets, valuation allowance	3.5
Deferred tax assets, net operating loss carryforwards	22.3
Deferred tax assets, deferred gain on sale-leaseback	7.8
Net operating loss carryforwards				61.8	32.0
Net operating loss carryforwards, expiration year						2031
Net operating loss carryforwards, stock compensation deductions						10.8
Recognized income tax benefit related to reversal of deferred tax valuation allowance			$ 47.8
Effective income tax rate on income from continuing operations	40.40%	9.40%