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Summary Of Significant Accounting Policies (Deferred Revenue) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Sep. 30, 2017
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Deferred Revenue Arrangement [Line Items] |  |
Deferred Revenue | $ 499,443 | $ 458,907
Deferred Subscription Revenue [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred Revenue | 288,012 | 193,376
Deferred Support Revenue [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred Revenue | 196,684 | 256,999
Deferred License and Subscription Revenue [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred Revenue | 1,475 | 1,773
Deferred Professional Service Revenue [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred Revenue | 13,272 | 6,759
Other Current Assets [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Billed but uncollected support and subscription-related revenue | $ 153,600 | $ 160,900

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- Definition Billed But Uncollected Support And Subscription-Related Revenue + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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