CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Dec. 30, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenues	$ 240,587	$ 217,075	$ 704,587	$ 618,186
Cost of revenues	91,311	88,690	275,120	263,001
Gross profit	149,276	128,385	429,467	355,185
Operating expenses:
Research and development	62,496	49,836	170,239	147,027
Selling, general and administrative	58,573	40,689	148,321	127,116
Total operating expenses	121,069	90,525	318,560	274,143
Operating income	28,207	37,860	110,907	81,042
Other-than-temporary impairment loss on investment	(841)	0	(2,841)	0
Interest expense	(7,177)	(6,638)	(21,407)	(20,369)
Interest income and other, net	(2,868)	1,570	1,240	6,500
Income before income taxes	17,321	32,792	87,899	67,173
Benefit from (provision for) income taxes	4,285	(101,033)	(73)	(100,020)
Net income (loss)	$ 21,606	$ (68,241)	$ 87,826	$ (32,847)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.17	$ (0.51)	$ 0.68	$ (0.25)
Diluted (in dollars per share)	$ 0.16	$ (0.51)	$ 0.65	$ (0.25)
Weighted average shares:
Basic (in shares)	129,074	132,689	129,283	133,087
Diluted (in shares)	137,182	132,689	135,438	133,087