Stock-Based Compensation (Stock Option Activity) (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Apr. 29, 2017	Apr. 30, 2016
Number of shares
Outstanding at January 28, 2017 (in shares)	48,564
Granted (in shares)	0	0
Exercised (in shares)	(16,188)
Forfeited (in shares)	0
Outstanding at April 29, 2017, all vested (in shares)	32,376
Weighted average exercise price
Outstanding at January 28, 2017 (in dollars per share)	$ 8.19
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	8.19
Forfeited (in dollars per share)	0.00
Outstanding at April 29, 2017, all vested (in dollars per share)	$ 8.19
Weighted average remaining contractual term (in years)	25 days
Aggregate intrinsic value	$ 1,839

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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-Publisher FASB
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

+ References

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

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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 per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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