Short-Term and Long-Term Investments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
May 04, 2013	Feb. 02, 2013
Schedule of Available-for-sale Securities [Line Items]
Short term investment in municipal bonds	$ 4.1	$ 6.2
Auction rate securities, fair value	1.7	1.7
Decline from par value	(0.4)
Auction rate securities, par value	$ (0.2)
Auction rate securities
Schedule of Available-for-sale Securities [Line Items]
Auction rate securities maturity period	24 years
Auction rate securities interest rate reset duration	Interest rate is reset through an auction process, most commonly at intervals of approximately 4 weeks.

- Definition

Bonds or similar securities issued by state, city, or local governments or the agencies operated by state, city, or local governments which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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