Basic and Diluted (Loss) Earnings per Share from Continuing Operations (Detail) (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010
Basic (loss) earnings per share:
(Loss) income from continuing operations	$ (37,354)	$ 521	$ (36,446)	$ (6,575)
Less: income associated with participating securities		15
(Loss) income (loss) available for common stockholders	(37,354)	506	(36,446)	(6,575)
Weighted average shares outstanding	69,074	68,338	68,891	63,105
Basic (loss) earnings per share - continuing operations	$ (0.54)	$ 0.01	$ (0.53)	$ (0.10)
Diluted (loss) earnings per share:
(Loss) income from continuing operations	(37,354)	521	(36,446)	(6,575)
Less: income associated with participating securities		15
(Loss) income (loss) available for common stockholders	$ (37,354)	$ 506	$ (36,446)	$ (6,575)
Weighted average shares outstanding	69,074	68,338	68,891	63,105
Effect of dilutive securities		1,182
Diluted weighted average shares outstanding	69,074	69,520	68,891	63,105
Diluted (loss) earnings per share - continuing operations	$ (0.54)	$ 0.01	$ (0.53)	$ (0.10)

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This element represents the income or loss from continuing operations attributable to the parent which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests, if any.

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

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The amount of net income (loss) derived from continuing operations during 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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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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Aggregate of earnings distributed and earnings allocated to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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