Stock Based Compensation Additional - (Details) (Class A Common Stock, USD $)	3 Months Ended	12 Months Ended
May 02, 2015	May 03, 2014	Jan. 31, 2015
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 15,683,000,000	$ 13,318,000,000	$ 10,357,000,000,000
Remaining Weighted-Average Vesting Period	3 years 4 months 24 days	3 years 4 months 24 days	2 years 7 months 6 days
Compensation Expense	621,000	506,000
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation Expense	4,000
Intrinsic Value	0
Options Granted	0
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Sold	7,763	11,286
Compensation Expense	$ 41,000	$ 46,000
Employee Stock Purchase Plan Share Purchase Discount	$ 5.34	$ 4.06

No authoritative reference available.

No definition available.

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- Definition

Represents the expense 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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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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

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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

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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Net number of share options (or share units) granted during the period.

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

+ References

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