CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 24,591	$ 42,423	$ 45,538	$ 80,581
Other comprehensive income (loss), net of taxes:
Currency translation adjustments, net of tax	(109)	(1,814)	(1,142)	(1,004)
Change in net unrealized gain (loss) on investments, net of tax	(489)	232	(33)	(678)
Change in unrealized loss on post-employment and post-retirement benefit plans, net of tax	0	(465)	0	(611)
Total other comprehensive loss	(598)	(2,047)	(1,175)	(2,293)
Comprehensive income	$ 23,993	$ 40,376	$ 44,363	$ 78,288