Goodwill and Intangible Assets, Net (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Jan. 03, 2016	Sep. 27, 2015	Dec. 28, 2014	Jun. 29, 2014	Jan. 03, 2016	Dec. 28, 2014	Dec. 07, 2015	Mar. 29, 2015
Finite-Lived Intangible Assets [Line Items]
Accumulated goodwill impairment loss	$ 920,300				$ 920,300			$ 922,500
Intangible Assets Purchased	$ 1,500	$ 9,900
Useful life	3 years	6 years 3 months
Amortization of intangible assets	$ 3,200		$ 1,300		$ 5,628	$ 5,572
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life					1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life					7 years 6 months
High-Speed Converter Business
Finite-Lived Intangible Assets [Line Items]
Long-lived assets impairment			$ 0		$ 0	$ 8,471
Existing Technology, Customer Relationships and Non-compete Agreements | High-Speed Converter Business
Finite-Lived Intangible Assets [Line Items]
Long-lived assets impairment				$ 5,600
Existing Technology | High-Speed Converter Business
Finite-Lived Intangible Assets [Line Items]
Long-lived assets impairment				4,600
Customer relationships | High-Speed Converter Business
Finite-Lived Intangible Assets [Line Items]
Long-lived assets impairment				900
Non-compete agreements | High-Speed Converter Business
Finite-Lived Intangible Assets [Line Items]
Long-lived assets impairment				$ 100
Zentrum Mikroelektronik Dresden AG
Finite-Lived Intangible Assets [Line Items]
Intangible assets							$ 126,200