Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Income Statement [Abstract]
Net revenues	$ 578,955	$ 582,784
Cost of revenues	179,700	198,411
Gross margin	399,255	384,373
Operating expenses:
Research and development	111,541	121,447
Selling, general and administrative	92,387	96,201
Amortization of acquisition-related intangibles	2,418	2,148
Total operating expenses	206,346	219,796
Operating income	192,909	164,577
Interest and other expense, net	9,930	9,672
Income before income taxes	182,979	154,905
Provision for income taxes	25,956	25,074
Net income	$ 157,023	$ 129,831
Net income per common share:
Basic	$ 0.59	$ 0.49
Diluted	$ 0.56	$ 0.47
Cash dividends per common share	$ 0.25	$ 0.22
Shares used in per share calculations:
Basic	264,153	263,055
Diluted	280,291	273,820