Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Product	$ 192,010	$ 209,124	$ 525,472	$ 437,616
Service	110,182	98,555	317,720	231,916
Total revenue	302,192	307,679	843,192	669,532
Cost of revenue:
Product (related party balances of $45, $8,736, $7,108 and $16,464, respectively)	55,296	77,147	171,770	165,066
Service (related party balances of $122, $2,225, $594 and $4,717, respectively)	26,382	28,968	81,452	62,532
Total cost of revenue	81,678	106,115	253,222	227,598
Gross profit	220,514	201,564	589,970	441,934
Operating expenses:
Research and development (related party balances of $43, $4,197, $1,616, and $15,011, respectively)	58,084	65,131	179,681	149,085
Sales and marketing (related party balances of $(49), $3,650, $2,423, and $12,728, respectively)	83,212	91,386	241,506	208,631
General and administrative (related party balances of $307 $6,383, $3,850 and $13,446, respectively)	28,540	30,973	90,994	82,477
Amortization of acquired intangible assets	17,515	11,249	52,646	21,901
Restructuring charges	(199)	572	1,730	468
Total operating expenses	187,152	199,311	566,557	462,562
Income (loss) from operations	33,362	2,253	23,413	(20,628)
Interest and other expense, net:
Interest income	207	189	627	519
Interest expense	(2,260)	(2,070)	(6,783)	(4,047)
Other expense, (net of related party balances of $0, $0, $0, and $383, respectively)	(695)	(1,022)	(1,926)	(349)
Total interest and other expense, net	(2,748)	(2,903)	(8,082)	(3,877)
Income (loss) before income tax expense	30,614	(650)	15,331	(24,505)
Income tax expense	9,369	23,857	4,350	248
Net income (loss)	$ 21,245	$ (24,507)	$ 10,981	$ (24,753)
Basic net income (loss) per share (in USD per share)	$ 0.23	$ (0.25)	$ 0.12	$ (0.32)
Diluted net income (loss) per share (in USD per share)	$ 0.23	$ (0.25)	$ 0.12	$ (0.32)
Weighted average common shares outstanding used in computing:
Net income (loss) per share - basic (in shares)	91,762	98,797	92,337	77,126
Net income (loss) per share - diluted (in shares)	92,402	98,797	92,997	77,126