Non-Cash Stock Compensation Expense (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Stock Option
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option compensation expense, net of tax	$ 1.4	$ 2.8	$ 0.8
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option compensation expense, net of tax	$ 0.3	$ 0.7	$ 0.5

The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration