Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Revenue:
Product	$ 64,366	$ 42,977
Service	43,486	38,828
Total revenue	107,852	81,805
Cost of revenue:
Product	13,766	9,773
Service	8,830	7,149
Total cost of revenue	22,596	16,922
Gross profit	85,256	64,883
Operating expenses:
Research and development	18,767	15,965
Sales and marketing	37,272	32,200
General and administrative	8,753	6,981
Amortization of acquired intangible assets	862	854
Total operating expenses	65,654	56,000
Income from operations	19,602	8,883
Interest and other income (expense), net:
Interest income	104	87
Interest expense	(194)	(190)
Other income, net	(41)	30
Total interest and other income (expense), net	(131)	(73)
Income before income tax expense	19,471	8,810
Income tax expense	7,995	3,557
Net income	$ 11,476	$ 5,253
Basic net income per share (in dollars per share)	$ 0.28	$ 0.13
Diluted net income per share (in dollars per share)	$ 0.27	$ 0.12
Weighted average common shares outstanding used in computing:
Net income per share - basic (in shares)	41,081	41,405
Net income per share - diluted (in shares)	41,808	42,068