Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Income Statement [Abstract]
Revenue	$ 288,520	$ 271,213	$ 892,232	$ 683,544
Cost of goods sold	180,997	184,403	586,584	465,945
Gross profit	107,523	86,810	305,648	217,599
Operating expenses:
Research and development	50,378	46,509	147,907	130,053
Marketing and selling	18,054	16,906	56,381	50,022
General and administrative	17,766	15,746	61,320	47,734
Other operating expense	5,933	1,969	11,957	7,127
Total operating expenses	92,131	81,130	277,565	234,936
Income (loss) from operations	15,392	5,680	28,083	(17,337)
Interest expense	(1,469)	(1,368)	(4,381)	(5,086)
Interest income	46	52	128	195
Loss on retirement of convertible subordinated notes (Note 4)	0	0	0	(2,756)
Other income	427	143	1,198	22
Income (loss) before income taxes	14,396	4,507	25,028	(24,962)
Income tax expense (Note 5)	(8,161)	(5,950)	(11,340)	(12,076)
Net income (loss)	$ 6,235	$ (1,443)	$ 13,688	$ (37,038)
Net income (loss) per share (Note 2):
Basic (in dollars per share)	$ 0.02	$ (0.01)	$ 0.05	$ (0.13)
Diluted (in dollars per share)	$ 0.02	$ (0.01)	$ 0.05	$ (0.13)
Shares used in per share calculation:
Basic (in shares)	282,439	279,523	281,749	277,562
Diluted (in shares)	287,920	279,523	287,553	277,562