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Share-Based Compensation - Summary of the Activity for Unvested Stock Option Awards (Details) - $ / shares shares in Thousands | 12 Months Ended
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Jan. 28, 2018 | Jan. 29, 2017 | Jan. 31, 2016
Number of Shares |  |  |
Options granted (in shares) | 135 |  |
Weighted Average Exercise Price (per share) |  |  |
Beginning balance (in dollars per share) | $ 24.79 |  |
Options granted (in dollars per share) | 37.70 |  |
Options forfeited (in dollars per share) | 26.22 |  |
Ending balance (in dollars per share) | 26.17 | $ 24.79 |
Weighted Average Grant Date Fair Value (per share) |  |  |
Options granted (in dollars per share) | $ 10.70 | $ 5.71 | $ 6.08
Unvested Stock Options Award |  |  |
Number of Shares |  |  |
Beginning balance (in shares) | 749 |  |
Options granted (in shares) | 135 |  |
Options vested (in shares) | (324) |  |
Options forfeited (in shares) | (26) |  |
Ending balance (in shares) | 534 | 749 |
Weighted Average Exercise Price (per share) |  |  |
Beginning balance (in dollars per share) | $ 22.66 |  |
Options granted (in dollars per share) | 37.70 |  |
Options vested (in dollars per share) | 23.92 |  |
Options forfeited (in dollars per share) | 26.23 |  |
Ending balance (in dollars per share) | 25.50 | $ 22.66 |
Weighted Average Grant Date Fair Value (per share) |  |  |
Beginning balance (in dollars per share) | 6.29 |  |
Options granted (in dollars per share) | 10.70 |  |
Options vested (in dollars per share) | 6.71 |  |
Options forfeited (in dollars per share) | 7.32 |  |
Ending balance (in dollars per share) | $ 7.10 | $ 6.29 |

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- Definition Share-based Compensation Arrangements by Share-based Payment Award, Options, Vested in Period, Weighted Average Exercise Price + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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