Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Consolidated Condensed Statements of Comprehensive Income [Abstract]
Net income	$ 34,880	$ 852	$ 68,234	$ 11,100
Changes to foreign currency
Foreign currency translation	961		178
Changes to available-for-sale securities
Unrealized gain (loss) on marketable securities	69	42	(79)	142
Change to pension liabilities
Reclassification of actuarial loss to net income	16		32
Net changes to foreign currency derivatives
Reclassification of unrealized loss to net income		(29)		(29)
Benefit (provision) for income taxes	(38)	(15)	14	(50)
Comprehensive income	$ 35,888	$ 850	$ 68,379	$ 11,163