Discontinued Operations (Results of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 28, 2015	Jun. 29, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations	$ (562)	$ 4,732
High-Speed Converter Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	176	1,006
Cost of revenues	(477)	(605)
Long-lived assets impairment	0	(8,471)
Operating expenses	(246)	(4,083)
Gain on divestiture	0	16,840
Income tax benefit (provision)	(15)	45
Net income (loss) from discontinued operations	$ (562)	$ 4,732