Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total revenue	$ 831,282	$ 891,820	$ 909,918
Cost of revenue:
Total cost of revenue	222,097	242,192	254,127
Gross profit	609,185	649,628	655,791
Operating expenses:
Research and development	179,163	188,294	203,588
Sales and marketing	242,730	276,523	291,870
General and administrative	88,969	99,994	93,572
Amortization of acquired intangible assets	61,131	64,505	74,305
Restructuring charges	62	2,674	18,693
Impairment of intangible assets	0	0	35,871
Loss on divestiture of business	0	0	9,472
Total operating expenses	572,055	631,990	727,371
Income (loss) from operations	37,130	17,638	(71,580)
Interest and other expense, net:
Interest income	646	4,528	5,245
Interest expense	(10,879)	(20,597)	(26,143)
Other income (expense), net	(4,593)	355	(434)
Total interest and other expense, net	(14,826)	(15,714)	(21,332)
Income (loss) before income tax expense (benefit)	22,304	1,924	(92,912)
Income tax expense (benefit)	2,952	4,678	(19,588)
Net income (loss)	$ 19,352	$ (2,754)	$ (73,324)
Basic net income (loss) per share (in dollars per share)	$ 0.26	$ (0.04)	$ (0.93)
Diluted net income (loss) per share (in dollars per share)	$ 0.26	$ (0.04)	$ (0.93)
Weighted average common shares outstanding used in computing:
Net income (loss) per share-basic (in shares)	73,103	75,162	78,617
Net income (loss) per share-diluted (in shares)	73,822	75,162	78,617
Product
Revenue:
Total revenue	$ 377,721	$ 438,341	$ 467,289
Cost of revenue:
Total cost of revenue	95,965	122,832	140,938
Service
Revenue:
Total revenue	453,561	453,479	442,629
Cost of revenue:
Total cost of revenue	$ 126,132	$ 119,360	$ 113,189