Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Aug. 02, 2014	Jul. 27, 2013
Income Taxes [Line Items]
Income taxes	$ 1,811	$ 15,526
Loss before taxes	$ 26,638	$ 71,496
Effective income tax rate	(6.80%)	(21.70%)
Federal statutory income tax rate	35.00%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

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