The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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-Name Accounting Standards Codification
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Amount of assets acquired at the acquisition date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Acquisitions (Schedule of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Mar. 31, 2015	Nov. 01, 2014	Sep. 11, 2014	Oct. 26, 2013
Business Acquisition, Purchase Price Allocation
Goodwill	$ 1,617,161		$ 1,567,723		$ 1,645,437
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition, Purchase Price Allocation
Cash		$ 161
Accounts receivable		154
Property and equipment, net		1,432
Identifiable intangible assets:		52,260
Goodwill		49,444
Other assets		86
Total assets acquired		103,537
Deferred revenue		(3,603)
Deferred tax liabilities		(3,049)
Other accrued liabilities		(795)
Total liabilities assumed		(7,447)
Net assets acquired		96,090
Business Acquisition, Goodwill, Expected Tax Deductible Amount		38,100
Vistapointe
Business Acquisition, Purchase Price Allocation
Property and equipment, net				$ 735
Identifiable intangible assets:				4,690
Goodwill				11,475
Net assets acquired				16,900
Core/developed technology \| Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition, Purchase Price Allocation
Finite-Lived Intangibles		28,450
Core/developed technology \| Vistapointe
Business Acquisition, Purchase Price Allocation
Finite-Lived Intangibles				1,710
Trade names \| Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition, Purchase Price Allocation
Finite-Lived Intangibles		500
Trade names \| Vistapointe
Business Acquisition, Purchase Price Allocation
Finite-Lived Intangibles				130
Customer relationships \| Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition, Purchase Price Allocation
Finite-Lived Intangibles		22,030
Patents with broader applications \| Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition, Purchase Price Allocation
Finite-Lived Intangibles		1,040
Non-compete agreements \| Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition, Purchase Price Allocation
Finite-Lived Intangibles		$ 240
In-process technology \| Vistapointe
Business Acquisition, Purchase Price Allocation
Indefinite-Lived Intangible Assets				$ 2,850