CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 26, 2020	Dec. 28, 2019
Net revenues	$ 484,685	$ 384,471	$ 1,251,375	$ 1,293,947
Cost of revenues	258,028	240,625	687,639	731,384
Gross profit	226,657	143,846	563,736	562,563
Operating expenses:
Research, development, and engineering	54,150	53,769	156,327	170,708
Selling, general, and administrative	129,641	144,978	361,892	457,004
(Gain) loss, net from litigation settlements	0	0	17,561	(1,162)
Restructuring and other related charges	13,977	21,724	49,477	47,096
Total operating expenses	197,768	220,471	585,257	673,646
Operating income (loss)	28,889	(76,625)	(21,521)	(111,083)
Interest expense	(18,417)	(22,533)	(58,182)	(70,262)
Other non-operating income, net	2,596	967	4,188	675
Income (loss) before income taxes	13,068	(98,191)	(75,515)	(180,670)
Income tax benefit	(7,045)	(19,708)	(7,208)	(31,406)
Net income (loss)	$ 20,113	$ (78,483)	$ (68,307)	$ (149,264)
Earnings (loss) per common share:
Basic (in dollars per share)	$ 0.49	$ (1.97)	$ (1.67)	$ (3.78)
Diluted (in dollars per share)	$ 0.48	$ (1.97)	$ (1.67)	$ (3.78)
Shares used in computing earnings (loss) per common share:
Basic (in shares)	41,252	39,784	40,894	39,535
Diluted (in shares)	42,184	39,784	40,894	39,535
Product
Net revenues	$ 420,711	$ 316,633	$ 1,059,846	$ 1,094,515
Cost of revenues	236,842	220,469	622,718	658,408
Service
Net revenues	63,974	67,838	191,529	199,432
Cost of revenues	$ 21,186	$ 20,156	$ 64,921	$ 72,976