Discontinued Operations (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended
	Apr. 27, 2015	May. 30, 2014	Jun. 28, 2015	Jun. 29, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures			$ 0	$ 15,300
Deferred gain on divestiture			30,600
High-Speed Converter Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures		$ 18,000		18,000
Cash held in escrow related to discontinued operations		$ 2,700
Holding period for escrow deposit (in months)		18 months
Gain on divestiture			0	16,840
Long-lived assets held for sale		$ 8,500
Fixed assets held for sale		2,900
Intangible assets held for sale		$ 5,600
Impairment charge				$ 8,500
Other Assets | High-Speed Converter Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures	$ 1,500
Other Noncurrent Liabilities | High-Speed Converter Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures			1,500
Disposal group, assets			(115)
Deferred gain on divestiture			$ 1,385