Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Dec. 31, 2016	Jan. 02, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 141,846	$ 130,819	$ 469,087	$ 405,833
Other comprehensive income (loss), net of tax:
Change in net unrealized losses on available-for-sale securities	(20,030)	(7,911)	(17,799)	(13,091)
Reclassification adjustment for (gains) losses on available-for-sale securities	(170)	8	(587)	(188)
Change in net unrealized losses on hedging transactions	(3,059)	(696)	(3,742)	(1,074)
Reclassification adjustment for losses on hedging transactions	875	2,166	1,513	6,110
Cumulative translation adjustment, net	(2,848)	(451)	(3,195)	(1,997)
Other comprehensive loss	(25,232)	(6,884)	(23,810)	(10,240)
Total comprehensive income	$ 116,614	$ 123,935	$ 445,277	$ 395,593