CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Cash flows provided by operating activities:
Net income (loss)	$ 93,909us-gaap_NetIncomeLoss	$ 88,364us-gaap_NetIncomeLoss	$ (20,172)us-gaap_NetIncomeLoss
Adjustments:
Depreciation	18,808us-gaap_DepreciationAndAmortization	20,872us-gaap_DepreciationAndAmortization	20,089us-gaap_DepreciationAndAmortization
Amortization of intangible assets	6,573us-gaap_AmortizationOfIntangibleAssets	24,793us-gaap_AmortizationOfIntangibleAssets	20,546us-gaap_AmortizationOfIntangibleAssets
Asset impairment	8,471us-gaap_OtherAssetImpairmentCharges	7,230us-gaap_OtherAssetImpairmentCharges	584us-gaap_OtherAssetImpairmentCharges
Gain from divestitures	(16,840)	(78,632)	(8,872)
Stock-based compensation expense, net of amounts capitalized in inventory	22,259us-gaap_ShareBasedCompensation	13,352us-gaap_ShareBasedCompensation	13,272us-gaap_ShareBasedCompensation
Other-than-temporary impairment loss on investments	0	0	1,708
Deferred tax provision	(293)us-gaap_DeferredIncomeTaxExpenseBenefit	(8)us-gaap_DeferredIncomeTaxExpenseBenefit	(3,492)us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in assets and liabilities (net of amounts acquired):
Accounts receivable, net	5,286	(6,821)	2,483
Inventories	4,412us-gaap_IncreaseDecreaseInInventories	2,935us-gaap_IncreaseDecreaseInInventories	15,510us-gaap_IncreaseDecreaseInInventories
Prepayments and other assets	(2,337)	4,348	15,921
Accounts payable	2,314	(144)	(3,163)
Accrued compensation and related expenses	19,306	1,847	(6,933)
Deferred income on shipments to distributors	1,688	(533)	(245)
Income taxes payable and receivable	90	(888)	929
Other accrued liabilities and long-term liabilities	8,126	(1,086)	(4,091)
Net cash provided by operating activities	171,772	75,629	44,074
Cash flows used in investing activities:
Acquisitions, net of cash acquired	0	0	(68,341)
Cash in escrow related to acquisitions	1,026	6,000	(7,816)
Proceeds from divestitures	15,300	96,299	14,237
Purchases of property, plant and equipment, net	(17,765)	(17,448)	(27,854)
Purchases of non-marketable equity securities	(4,000)	0	0
Purchases of short-term investments	(285,817)	(463,283)	(207,576)
Proceeds from sales of short-term investments	119,070	231,890	59,850
Proceeds from maturities of short-term investments	90,344	34,422	171,709
Net cash used for investing activities	(81,842)	(112,120)	(65,791)
Cash flows provided by (used for) financing activities:
Proceeds from issuance of common stock	21,067	46,066	17,395
Repurchase of common stock	(79,245)	(44,005)	0
Payment of acquisition related contingent consideration	(1,600)	(5,130)	0
Net cash provided by (used for) financing activities	(59,778)	(3,069)	17,395
Effect of exchange rates on cash and cash equivalents	(4,418)	(66)	235
Net increase (decrease) in cash and cash equivalents	25,734	(39,626)	(4,087)
Cash and cash equivalents at beginning of period	91,211	130,837
Cash and cash equivalents at end of period	116,945	91,211	130,837
Cash paid for:
Interest	26us-gaap_InterestPaid	22us-gaap_InterestPaid	1,374us-gaap_InterestPaid
Income taxes, net of refunds	1,840us-gaap_IncomeTaxesPaidNet	1,848us-gaap_IncomeTaxesPaidNet	(84)us-gaap_IncomeTaxesPaidNet
Non-cash investing activities:
Additions to property, plant and equipment included in accounts payable	$ 473	$ 223	$ 523

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 8B

-URI http://asc.fasb.org/extlink&oid=27724398&loc=SL6284393-111563

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Namespace Prefix:	us-gaap_
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Period Type:	duration

- Definition

The cash outflow to reacquire common stock during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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- Definition

The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

-Paragraph 13

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Period Type:	duration

- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

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- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

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Period Type:	duration

- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

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- Definition

The cash inflow from the additional capital contribution to the entity.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-Paragraph 14

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- Definition

The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Paragraph 12

-Subparagraph (a),(b)

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- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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