Goodwill and Intangible Assets, Net (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Mar. 29, 2015	May. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated goodwill impairment loss	$ 920,300		$ 922,500
Amortization of intangible assets	$ 831	$ 2,548
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	7 years
High-Speed Converter Business
Finite-Lived Intangible Assets [Line Items]
Intangible assets held for sale				$ 5,600
Long-lived assets impairment	$ 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