Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Mar. 29, 2014
Deferred tax assets:
Inventory valuation	$ 6,377us-gaap_DeferredTaxAssetsInventory	$ 7,692us-gaap_DeferredTaxAssetsInventory
Accrued expenses and allowances	4,705	3,905
Net operating loss carryforwards	57,878	29,062
Research and development tax credit carryforwards	14,567	15,164
State tax credit carryforwards	225	231
Capitalized research and development	1,793	3,485
Other	30,695us-gaap_DeferredTaxAssetsOther	28,627us-gaap_DeferredTaxAssetsOther
Total deferred tax assets	116,240us-gaap_DeferredTaxAssetsGross	88,166us-gaap_DeferredTaxAssetsGross
Valuation allowance for deferred tax assets	(33,190)	(32,159)
Net deferred tax assets	83,050us-gaap_DeferredTaxAssetsNet	56,007us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Depreciation and amortization	6,827	5,709
Acquisition intangibles	35,242	3,209
Total deferred tax liabilities	42,069us-gaap_DeferredTaxLiabilities	8,918us-gaap_DeferredTaxLiabilities
Total net deferred tax assets	$ 40,981us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 47,089us-gaap_DeferredTaxAssetsLiabilitiesNet

Deferred Tax Liabilities Depreciation And Amortization

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from in-process research and development costs expensed in connection with a business combination.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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