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Share-Based Compensation Arrangements - Stock Option Activity (Detail)	12 Months Ended
	Jan. 30, 2016 $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Options, Beginning balance | shares	1,371,785
Number of Options, Options granted | shares	187,500
Number of Options, Options exercised | shares	(475,450)
Number of Options, Options forfeited | shares	(28,267)
Number of Options, Ending balance | shares	1,055,568
Number of Options, Exercisable | shares	724,049
Weighted Average Exercise Price, Beginning balance | $ / shares	$ 12.40
Weighted Average Exercise Price, Options granted | $ / shares	25.52
Weighted Average Exercise Price, Options exercised | $ / shares	10.66
Weighted Average Exercise Price, Options forfeited | $ / shares	19.97
Weighted Average Exercise Price, Ending balance | $ / shares	14.51
Weighted Average Exercise Price, Exercisable | $ / shares	$ 11.52
Weighted Average Remaining Contractual Term (in years), Outstanding	6 years
Weighted Average Remaining Contractual Term (in years), Exercisable	4 years 9 months 18 days

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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.

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-Publisher FASB
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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-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 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 vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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