Accumulated Other Comprehensive Income (Loss) (Changes) (Details) $ in Thousands	3 Months Ended
	Jul. 03, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	$ 676,695
Other comprehensive income (loss) before reclassifications	(680)
Amounts reclassified out of accumulated other comprehensive income	103
Net current-period other comprehensive income (loss)	(577)
Balance, ending	708,190
Cumulative translation adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(4,001)
Other comprehensive income (loss) before reclassifications	(1,033)
Amounts reclassified out of accumulated other comprehensive income	0
Net current-period other comprehensive income (loss)	(1,033)
Balance, ending	(5,034)
Unrealized gain on available-for-sale investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	222
Other comprehensive income (loss) before reclassifications	353
Amounts reclassified out of accumulated other comprehensive income	103
Net current-period other comprehensive income (loss)	456
Balance, ending	678
Pension adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	65
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified out of accumulated other comprehensive income	0
Net current-period other comprehensive income (loss)	0
Balance, ending	65
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(3,714)
Balance, ending	$ (4,291)