Discontinued Operations (Results of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Jun. 29, 2014	Sep. 27, 2015	Sep. 28, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from discontinued operations	$ 0	$ (9,804)		$ (562)	$ (5,072)
High-Speed Converter Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	0	1,332		176	2,338
Cost of revenues	0	(413)		(477)	(1,018)
Long-lived assets impairment	0	0		0	(8,471)
Restructuring costs (see Note 12)	0	(6,775)		0	(6,775)
Operating expenses	0	(3,891)		(246)	(7,974)
Gain on divestiture	0	0	$ 16,840	0	16,840
Income tax provision	0	(57)		(15)	(12)
Net loss from discontinued operations	$ 0	$ (9,804)		$ (562)	$ (5,072)