Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
May 03, 2015	Apr. 27, 2014	Apr. 28, 2013
Current:
Federal	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ (385)us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit
State	209	523	(45)
Foreign	8,814us-gaap_CurrentForeignTaxExpenseBenefit	5,691us-gaap_CurrentForeignTaxExpenseBenefit	3,896us-gaap_CurrentForeignTaxExpenseBenefit
Current income tax expense (benefit)	9,023us-gaap_CurrentIncomeTaxExpenseBenefit	5,829us-gaap_CurrentIncomeTaxExpenseBenefit	3,851us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	(607)	0	0
State	(14)	0	0
Foreign	393	(2,945)	(3,624)
Deferred income tax expense (benefit)	(228)us-gaap_DeferredIncomeTaxExpenseBenefit	(2,945)us-gaap_DeferredIncomeTaxExpenseBenefit	(3,624)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for income taxes	8,795us-gaap_IncomeTaxExpenseBenefit	2,884us-gaap_IncomeTaxExpenseBenefit	227us-gaap_IncomeTaxExpenseBenefit
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S.	(29,300)	46,314	(21,863)
Foreign	49,982	68,107	14,025
Income (loss) before income taxes and non-controlling interest	$ 20,682	$ 114,421	$ (7,838)

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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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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