Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 127,298	$ 171,516	$ 275,013	$ 345,127
Other comprehensive income (loss), net of tax:
Change in net unrealized gains (losses) on available-for-sale securities	(253)	(3,728)	(5,180)	4,231
Reclassification adjustment for gains on available-for-sale securities	(18)	(927)	(196)	(1,318)
Change in net unrealized losses on hedging transactions	(2,496)	(3,602)	(378)	(3,060)
Reclassification adjustment for (gains) losses on hedging transactions	2,071	(211)	3,944	(1,018)
Cumulative translation adjustment, net	(623)	(578)	(1,546)	(407)
Other comprehensive loss	(1,319)	(9,046)	(3,356)	(1,572)
Total comprehensive income	$ 125,979	$ 162,470	$ 271,657	$ 343,555