Investments (Unrealized Loss) (Details) - USD ($) $ in Thousands	Oct. 02, 2016	Apr. 03, 2016
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses
Unrealized Loss Less than 12 months	$ (235)	$ (187)
Unrealized Loss 12 months or Greater	0	0
Unrealized Loss Total	(235)	(187)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Fair Value Less than 12 months	107,425	44,483
Fair Value 12 months or Greater	0	0
Fair Value Total	107,425	44,483
Corporate bonds
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses
Unrealized Loss Less than 12 months	(128)	(179)
Unrealized Loss 12 months or Greater	0	0
Unrealized Loss Total	(128)	(179)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Fair Value Less than 12 months	64,389	33,407
Fair Value 12 months or Greater	0	0
Fair Value Total	64,389	33,407
Asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses
Unrealized Loss Less than 12 months		(7)
Unrealized Loss 12 months or Greater		0
Unrealized Loss Total		(7)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Fair Value Less than 12 months		4,979
Fair Value 12 months or Greater		0
Fair Value Total		4,979
U.S. government treasuries and agencies securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses
Unrealized Loss Less than 12 months	(34)	(1)
Unrealized Loss 12 months or Greater	0	0
Unrealized Loss Total	(34)	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Fair Value Less than 12 months	36,109	6,097
Fair Value 12 months or Greater	0	0
Fair Value Total	36,109	$ 6,097
Corporate commercial paper
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses
Unrealized Loss Less than 12 months	(73)
Unrealized Loss 12 months or Greater	0
Unrealized Loss Total	(73)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Fair Value Less than 12 months	6,927
Fair Value 12 months or Greater	0
Fair Value Total	$ 6,927

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.

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