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Goodwill and Other Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 110,697 | $ 86,308
Accumulated amortization | (76,228) | (74,508)
Net | 34,469 | 11,800
Purchased and Core Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 55,296 | 51,292
Accumulated amortization | (46,841) | (46,304)
Net | 8,455 | 4,988
License Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 18 | 18
Accumulated amortization | (17) | (17)
Net | 1 | 1
Patents and Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 14,553 | 12,484
Accumulated amortization | (11,505) | (11,280)
Net | 3,048 | 1,204
Customer Relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 40,230 | 21,914
Accumulated amortization | (17,745) | (16,817)
Net | 22,485 | 5,097
Non-compete Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 600 | 600
Accumulated amortization | (120) | (90)
Net | $ 480 | $ 510

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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