Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
Consolidated Condensed Statements of Comprehensive Income [Abstract]
Net income	$ 33,354	$ 10,248
Changes to foreign currency
Foreign currency translation	(783)
Changes to available-for-sale securities
Unrealized gain (loss) on marketable securities	(148)	100
Change to pension liabilities
Reclassification of actuarial loss to net income	16
Benefit (provision) for income taxes	52	(35)
Comprehensive income	$ 32,491	$ 10,313