Stock-Based Compensation (Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Apr. 28, 2012
Stock-Based Compensation [Abstract]
Outstanding at January 28, 2012, Number of shares	2,418
Granted, Number of shares
Exercised, Number of shares	(459)
Forfeited, Number of shares
Outstanding at April 28, 2012, all vested, Number of shares	1,959
Outstanding at January 28, 2012, Weighted average exercise price	$ 13.24
Granted, Weighted average exercise price
Exercised, Weighted average exercise price	$ 11.86
Forfeited, Weighted average exercise price
Outstanding at April 28, 2012, all vested, Weighted average exercise price	$ 13.56
Outstanding at April 28, 2012, all vested, Weighted average remaining contractual term	2 years 8 months 27 days
Outstanding at April 28, 2012, all vested, Aggregate intrinsic value	$ 95,322

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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

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

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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No definition available.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Number of share options (or share units) exercised during the current period.

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