Summary of Significant Accounting Policies (Store Pre-Opening Costs) - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Significant Accounting Policies [Line Items]
Pre-opening costs	$ 3.5	$ 3.4	$ 2.3

Expenditures associated with opening new locations which are noncapital in nature and expensed as incurred.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_PreOpeningCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration