Investments (Unrealized Loss) (Details) - USD ($) $ in Thousands	Jul. 03, 2016	Apr. 03, 2016
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Fair Value Less than 12 months	$ 41,524	$ 44,483
Unrealized Loss Less than 12 months	(138)	(187)
Fair Value 12 months or Greater	0	0
Unrealized Loss 12 months or Greater	0	0
Fair Value Total	41,524	44,483
Unrealized Loss Total	(138)	(187)
Corporate bonds
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Fair Value Less than 12 months	37,650	33,407
Unrealized Loss Less than 12 months	(136)	(179)
Fair Value 12 months or Greater	0	0
Unrealized Loss 12 months or Greater	0	0
Fair Value Total	37,650	33,407
Unrealized Loss Total	(136)	(179)
Asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Fair Value Less than 12 months	3,874	4,979
Unrealized Loss Less than 12 months	(2)	(7)
Fair Value 12 months or Greater	0	0
Unrealized Loss 12 months or Greater	0	0
Fair Value Total	3,874	4,979
Unrealized Loss Total	$ (2)	(7)
U.S. government treasuries and agencies securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]
Fair Value Less than 12 months		6,097
Unrealized Loss Less than 12 months		(1)
Fair Value 12 months or Greater		0
Unrealized Loss 12 months or Greater		0
Fair Value Total		6,097
Unrealized Loss Total		$ (1)