Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Total revenue	$ 891,820	$ 909,918	$ 986,787
Cost of revenue:
Total cost of revenue	242,192	254,127	271,905
Gross profit	649,628	655,791	714,882
Operating expenses:
Research and development	188,294	203,588	215,076
Sales and marketing	276,523	291,870	312,536
General and administrative	99,994	93,572	109,479
Amortization of acquired intangible assets	64,505	74,305	76,640
Restructuring charges	2,674	18,693	5,209
Impairment of intangible assets	0	35,871	0
Loss on divestiture of business	0	9,472	0
Total operating expenses	631,990	727,371	718,940
Income (loss) from operations	17,638	(71,580)	(4,058)
Interest and other income (expense), net:
Interest income	4,528	5,245	1,808
Interest expense	(20,597)	(26,143)	(12,633)
Other income (expense), net	355	(434)	(3,776)
Total interest and other expense, net	(15,714)	(21,332)	(14,601)
Income (loss) before income tax expense (benefit)	1,924	(92,912)	(18,659)
Income tax expense (benefit)	4,678	(19,588)	(98,471)
Net income (loss)	$ (2,754)	$ (73,324)	$ 79,812
Basic net income (loss) per share (in dollars per share)	$ (0.04)	$ (0.93)	$ 0.91
Diluted net income (loss) per share (in dollars per share)	$ (0.04)	$ (0.93)	$ 0.90
Weighted average common shares outstanding used in computing:
Net income (loss) per share-basic (in shares)	75,162	78,617	87,425
Net income (loss) per share-diluted (in shares)	75,162	78,617	88,261
Product
Revenue:
Total revenue	$ 438,341	$ 467,289	$ 520,418
Cost of revenue:
Total cost of revenue	122,832	140,938	158,628
Service
Revenue:
Total revenue	453,479	442,629	466,369
Cost of revenue:
Total cost of revenue	$ 119,360	$ 113,189	$ 113,277