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Description of Business and Basis of Presentation Reclassification (Details) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2016 USD ($) revenue_category | Sep. 30, 2015 USD ($) revenue_category | Sep. 30, 2014 USD ($) revenue_category
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Revenue, Net | $ 1,140,533 | $ 1,255,242 | $ 1,356,967
Number of Revenue Categories | revenue_category | 4 | 3 | 3
Number of Cost of Revenue Categories | revenue_category | 2 | 3 | 3
Perpetual license | $ 173,467 | $ 282,760 | $ 362,602
Subscription | 118,322 | 65,239 | 27,137
Cost of software revenue | $ 155,439 | 135,992 | 129,708
From License and Subscription to Perpetual License [Member] [Domain] | Restatement Adjustment [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Perpetual license |  | 282,800 | 362,600
From License and Subscription to Subscription License [Member] [Domain] | Restatement Adjustment [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Subscription |  | 65,200 | 27,100
From License and Subscription to Software [Member] [Domain] | Restatement Adjustment [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Cost of software revenue |  | 53,200 | 45,000
From Support to Software [Member] [Domain] | Restatement Adjustment [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Cost of software revenue |  | 82,800 | 84,700
From General and Administration to Selling and Marketing [Member] | Restatement Adjustment [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Cost of software revenue |  | 8,000 | $ 10,000
Out of Period Correction [Member] | Restatement Adjustment [Member] |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Revenue, Net |  | $ 6,400 |

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- Definition Costs incurred and are directly related to generating license revenue. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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