Net Income Per Share - Reconciliations of Basic and Diluted Share Calculations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
May 02, 2015	May 03, 2014
Earnings Per Share Disclosure
Net income	$ 13,552us-gaap_NetIncomeLoss	$ 5,183us-gaap_NetIncomeLoss
Weighted Average Number of Shares Outstanding, Diluted
Weighted average shares outstanding	44,974	45,578
Effect of dilutive securities (shares)	409	465
Weighted average shares outstanding assuming dilution	45,383	46,043
Basic Earnings per Share
Basic earnings per share (dollars per share)	$ 0.30us-gaap_EarningsPerShareBasic	$ 0.11us-gaap_EarningsPerShareBasic
Diluted Earnings per Share
Diluted earnings per share (dollars per share)	$ 0.29us-gaap_EarningsPerShareDiluted	$ 0.11us-gaap_EarningsPerShareDiluted
Earnings Per Share, Basic. [Member]
Earnings Per Share Disclosure
Net income	13,552	5,183
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	258	102
Net Income Available to Common Stockholders, Basic	13,294	5,081
Earnings Per Share, Diluted
Earnings Per Share Disclosure
Net income	13,552	5,183
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted	256	101
Net Income Available to Common Stockholders, Diluted	$ 13,296	$ 5,082

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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