Accumulated Other Comprehensive Income (Loss) - Reclassification Out of AOCI By Component (Details) $ in Thousands	3 Months Ended
	Jul. 02, 2017 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	$ 773,663
Other comprehensive income before reclassifications	1,523
Amounts reclassified out of accumulated other comprehensive loss	14
Net current-period other comprehensive income gain	1,537
Balance, ending	775,606
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(6,785)
Balance, ending	(5,248)
Cumulative translation adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(6,043)
Other comprehensive income before reclassifications	1,403
Amounts reclassified out of accumulated other comprehensive loss	0
Net current-period other comprehensive income gain	1,403
Balance, ending	(4,640)
Unrealized gain or loss on available-for-sale investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(807)
Other comprehensive income before reclassifications	120
Amounts reclassified out of accumulated other comprehensive loss	14
Net current-period other comprehensive income gain	134
Balance, ending	(673)
Pension adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	65
Other comprehensive income before reclassifications	0
Amounts reclassified out of accumulated other comprehensive loss	0
Net current-period other comprehensive income gain	0
Balance, ending	$ 65