Stock Compensation Plans - Additional Information (Detail) $ in Millions	12 Months Ended
Jan. 30, 2016 USD ($) CompensationPlan shares	Jan. 31, 2015 shares
Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of annual retainer	50.00%
Employee Stock Plan, 2006 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock-based compensation plan \| CompensationPlan	1
Increase in authorized shares	7,250,000
Share-based compensation arrangement by share-based payment award, vesting period	3 years
Options expiration period from the date of grant	10 years
Unrecognized stock compensation cost \| $	$ 5.3
Shares available for future grant	1,014,685
Grants remaining outstanding	2,728,621	2,747,802
Employee Stock Plan, 2006 Plan \| Employees And Executives
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, vesting period	3 years
Employee Stock Plan, 2006 Plan \| Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, vesting period	2 years
Employee Stock Plan, 2006 Plan \| Awards Other Than Stock Options and Stock Appreciation Rights
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in authorized shares	4,250,000
Shares available for future grant	910,279
Employee Stock Plan, 2006 Plan \| Restricted stocks
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock compensation cost \| $	$ 8.0
Employee Stock Plan, 2006 Plan \| Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock compensation cost \| $	4.8
Employee Stock Plan, 2006 Plan \| Time Based Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock compensation cost \| $	$ 0.5
Unrecognized stock compensation cost weighted average recognition period	12 months
Employee Stock Plan, 1992 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grants remaining outstanding	0	217,500

Number of stock based compensation plans.

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- Definition

Percentage of annual retainer.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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