Accumulated Other Comprehensive Income (Loss) (Changes) (Details) $ in Thousands	6 Months Ended
	Oct. 02, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	$ 676,695
Other comprehensive income (loss) before reclassifications	(782)
Amounts reclassified out of accumulated other comprehensive income	(393)
Net current-period other comprehensive loss	(1,175)
Balance, ending	722,433
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(3,714)
Balance, ending	(4,889)
Cumulative translation adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(4,001)
Other comprehensive income (loss) before reclassifications	(1,142)
Amounts reclassified out of accumulated other comprehensive income	0
Net current-period other comprehensive loss	(1,142)
Balance, ending	(5,143)
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	360
Amounts reclassified out of accumulated other comprehensive income	(393)
Net current-period other comprehensive loss	(33)
Balance, ending	189
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 loss	0
Balance, ending	$ 65