Summary Information About Stock Options Outstanding and Exercisable (Detail) (USD $)			12 Months Ended
Feb. 02, 2013	Jan. 28, 2012	Feb. 02, 2013 Range One	Feb. 02, 2013 Range Two	Feb. 02, 2013 Range Three	Feb. 02, 2013 Range Four	Feb. 02, 2013 Range Five	Feb. 02, 2013 Range Six	Feb. 02, 2013 Range Seven	Feb. 02, 2013 Range Eight	Feb. 02, 2013 Range Nine	Feb. 02, 2013 Range Ten	Feb. 02, 2013 Range 11
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices lower			$ 4.56	$ 5.77	$ 5.79	$ 7.45	$ 9.60	$ 9.69	$ 9.71	$ 13.79	$ 21.30	$ 25.51	$ 4.56
Range of Exercise Prices upper			$ 5.66	$ 5.77	$ 7.32	$ 9.56	$ 9.60	$ 9.69	$ 13.09	$ 21.24	$ 21.30	$ 25.51	$ 25.51
Options			334,413	1,539,000	758,450	868,248	50,000	1,138,000	636,604	793,329	2,500	98,850	6,219,394
Weighted- Average Exercise Price	$ 9.37	$ 9.29	$ 4.94	$ 5.77	$ 6.79	$ 8.88	$ 9.60	$ 9.69	$ 10.99	$ 17.40	$ 21.30	$ 25.51	$ 9.37
Weighted- Average Contractual Life (Years)			6 years 29 days	7 years 7 months 2 days	7 years 4 months 6 days	6 years 10 months 9 days	7 years 5 months 9 days	9 years 1 month 13 days	5 years 3 months 29 days	1 year 5 months 12 days	1 year 3 months 29 days	1 year 1 month 3 days	6 years 6 months 15 days
Options			253,783	693,581	370,819	394,326	0	0	353,050	793,329	2,500	98,850	2,960,238
Exercisable Weighted- Average Exercise Price			$ 4.91	$ 5.77	$ 6.57	$ 8.96	$ 0.00	$ 0.00	$ 11.44	$ 17.40	$ 21.30	$ 25.51	$ 10.69
Weighted- Average Contractual Life (Years)													4 years 5 months 12 days

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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