Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Total revenue	$ 223,797	$ 256,863	$ 428,908	$ 482,619
Cost of revenue:
Total cost of revenue	63,980	74,243	126,007	140,805
Gross profit	159,817	182,620	302,901	341,814
Operating expenses:
Research and development (related party balances of $0, $0, $2 and $3, respectively)	55,959	58,509	111,422	117,475
Sales and marketing (related party balances of $0, $0, $0 and $2, respectively)	72,051	77,266	150,183	162,627
General and administrative (related party balances of $2, $700, $15 and $944, respectively)	25,294	29,495	51,353	59,367
Amortization of acquired intangible assets	17,981	18,298	41,446	36,681
Restructuring charges	2,472	291	3,619	458
Impairment of intangible assets	0	0	35,871	0
Loss on divestiture of business	9,177	0	9,177	0
Total operating expenses	182,934	183,859	403,071	376,608
Loss from operations	(23,117)	(1,239)	(100,170)	(34,794)
Interest and other expense, net:
Interest income	1,293	410	2,233	890
Interest expense	(6,427)	(2,565)	(12,315)	(5,116)
Other expense	(812)	(1,168)	(557)	(2,232)
Total interest and other expense, net	(5,946)	(3,323)	(10,639)	(6,458)
Loss before income tax benefit	(29,063)	(4,562)	(110,809)	(41,252)
Income tax benefit	(2,635)	(2,094)	(21,877)	(14,562)
Net loss	$ (26,428)	$ (2,468)	$ (88,932)	$ (26,690)
Basic net loss per share (in USD per share)	$ (0.34)	$ (0.03)	$ (1.12)	$ (0.30)
Diluted net loss per share (in USD per share)	$ (0.34)	$ (0.03)	$ (1.12)	$ (0.30)
Weighted average common shares outstanding used in computing:
Net loss per share - basic (in shares)	78,631	88,589	79,490	89,878
Net loss per share - diluted (in shares)	78,631	88,589	79,490	89,878
Product
Revenue:
Total revenue	$ 110,753	$ 142,973	$ 207,680	$ 251,632
Cost of revenue:
Total cost of revenue	34,492	44,371	67,457	80,833
Service
Revenue:
Total revenue	113,044	113,890	221,228	230,987
Cost of revenue:
Total cost of revenue	$ 29,488	$ 29,872	$ 58,550	$ 59,972