Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue	$ 207,666	$ 180,010
Costs and expenses:
Cost of revenue	37,073	30,850
Research and development	23,790	21,273
Selling, general and administrative	86,078	81,139
Costs and Expenses, Total	146,941	133,262
Income from operations	60,725	46,748
Other income:
Investment income, net	3,049	1,551
Other income, net	39,364	188
Nonoperating Income (Expense), Total	42,413	1,739
Income before income taxes	103,138	48,487
Income tax provision (benefit)	14,215	(41,579)
Net income	$ 88,923	$ 90,066
Basic net income per share	$ 1.97	$ 2.02
Basic weighted average shares outstanding	45,215	44,546
Diluted net income per share	$ 1.93	$ 1.95
Diluted weighted average shares outstanding	46,092	46,169

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Name:	us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Total costs of sales and operating expenses for the period.