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Employee Benefit Plans (Tables) | 12 Months Ended
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Jan. 31, 2015
Compensation and Retirement Disclosure [Abstract] |
Stock Option Activity | Stock option activity for the year ended January 31, 2015, was as follows:
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (in years) |
Balance at February 1, 2014 |  |  | 1,285,792 |  |  | $ | 11.77 |  |  |  |  |
Options granted |  |  | 182,500 |  |  |  | 18.46 |  |  |  |  |
Options exercised |  |  | (30,785 | ) |  |  | 13.07 |  |  |  |  |
Options forfeited |  |  | (65,722 | ) |  |  | 16.62 |  |  |  |  |
Balance at January 31, 2015 |  |  | 1,371,785 |  |  | $ | 12.40 |  |  |  | 5.8 |
Options Exercisable As of: |  |  |  |  |  |  |  |  |  |  |  |
January 31, 2015 |  |  | 1,006,464 |  |  | $ | 11.06 |  |  |  | 4.8 |
Weighted Average for Key Assumptions Used in Determining the Fair Value of Options Granted and a Summary of the Methodology Applied to Develop Each Assumption | The weighted average for key assumptions used in determining the fair value of options granted in fiscal years 2014, 2013 and 2012 and a summary of the methodology applied to develop each assumption are as follows:
|  | 52 Weeks Ended January 31, 2015 |  |  | 52 Weeks Ended February 1, 2014 |  |  | 53 Weeks Ended February 2, 2013 |
Expected price volatility |  |  | 0.53 |  |  |  | 0.65 |  |  |  | 0.56 |
Risk-free interest rate |  |  | 2.10 | % |  |  | 1.46 | % |  |  | 0.77 | %
Expected life |  |  | 6.3 years |  |  |  | 6.3 years |  |  |  | 6.3 years |
Forfeiture rate |  |  | 5 | % |  |  | 5 | % |  |  | 5 | %
Dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
RSU Activity in Each of the Periods | RSU activity in each of the periods indicated was as follows:
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested at February 1, 2014 |  |  | 236,000 |  |  | $ | 13.44 |
Granted |  |  | 97,000 |  |  |  | 18.46 |
Vested |  |  | (82,000 | ) |  |  | 13.34 |
Forfeited |  |  | (19,500 | ) |  |  | 14.31 |
Non-vested at January 31, 2015 |  |  | 231,500 |  |  | $ | 15.50 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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