Marketable Securities (Schedule of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Mar. 26, 2016	Mar. 28, 2015
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value (Net Carrying Amount)	$ 81,213	$ 184,318
Gross Unrealized Losses	(100)	(83)
Gross Unrealized Gains		10
Amortized Cost	81,310	184,391
Corporate Debt Securities - U.S. [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value (Net Carrying Amount)	81,213	153,836
Gross Unrealized Losses	(100)	(68)
Gross Unrealized Gains	3	8
Amortized Cost	$ 81,310	153,896
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value (Net Carrying Amount)		27,995
Gross Unrealized Losses		(15)
Amortized Cost		28,010
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value (Net Carrying Amount)		2,487
Gross Unrealized Gains		2
Amortized Cost		$ 2,485

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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Amount of debt securities categorized neither as held-to-maturity nor trading.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
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-Name Accounting Standards Codification
-Topic 320
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-Section 45
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

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