Interest and Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Components of interest and other expense
Interest income	$ 13,832	$ 12,098	$ 27,246	$ 23,564
Interest expense	(11,029)	(13,870)	(23,110)	(27,738)
Other income (expense), net	(972)	621	(467)	(1,564)
Interest and other expense, net	$ 1,831	$ (1,151)	$ 3,669	$ (5,738)