Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	May 03, 2015	Apr. 27, 2014	Apr. 28, 2013
Deferred tax assets:
Inventory adjustments	$ 10,024	$ 8,905	$ 9,170
Accruals and reserves	13,081	18,673	14,194
Tax credits	27,836	24,259	21,869
Net operating loss carryforwards	101,850	95,952	155,281
Gain/loss on investments under equity or cost method	8,367	8,843	8,931
Depreciation and amortization	4,509	2,817	1,915
Purchase accounting for intangible assets	4,438	5,651	190
Capital loss carryforward	172	229	563
Acquired intangibles	8,208	10,142	18,356
Stock compensation	9,302	8,372	7,917
Total deferred tax assets	187,787	183,843	238,386
Valuation allowance	(161,358)	(153,657)	(227,889)
Net deferred tax assets	26,429	30,186	10,497
Deferred tax liabilities:
Acquired intangibles	(5,597)	(7,252)	(5,128)
Debt discount	(13,862)	(16,873)	(1,592)
Inventory reserve	(513)	(457)	(1,791)
Depreciation and amortization	(7,068)	(5,762)	(774)
Total deferred tax liabilities	(27,040)	(30,344)	(9,285)
Total net deferred tax assets (liabilities)	$ (611)	$ (158)	$ 1,212