Goodwill and Intangible Assets, Net (Intangible Assets) (Details) - USD ($) $ in Thousands	Jan. 01, 2017	Apr. 03, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 472,729	$ 474,712
Impairment	(1,310)
Accumulated Amortization	(357,261)	(346,951)
Net Assets	114,158	127,761
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Assets	278,767	279,514
Impairment	0
Accumulated Amortization	(213,337)	(205,307)
Net Assets	65,430	74,207
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Assets	5,081	5,211
Impairment	0
Accumulated Amortization	(4,991)	(4,576)
Net Assets	90	635
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Assets	172,685	172,787
Impairment	0
Accumulated Amortization	(135,188)	(130,745)
Net Assets	37,497	42,042
Intellectual property licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Assets	16,196	11,400
Impairment	(1,310)
Accumulated Amortization	(3,745)	(1,819)
Net Assets	$ 11,141	9,581
Order backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Assets		5,800
Accumulated Amortization		(4,504)
Net Assets		$ 1,296