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Segment Information (Revenue By Product Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Revenue | $ 1,164,039 | $ 1,140,533 | $ 1,255,242
CAD [Member] |  |  |
Revenue | 474,608 | 462,307 | 511,582
Extended PLM [Member] |  |  |
Revenue | 454,299 | 456,285 | 524,741
SLM [Member] |  |  |
Revenue | 131,773 | 141,644 | 166,060
IoT Segment [Member] |  |  |
Revenue | $ 103,359 | $ 80,297 | $ 52,859

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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