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Goodwill and Other Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 77,361 | $ 80,413
Accumulated amortization | (72,572) | (73,628)
Net | 4,789 | 6,785
Purchased and Core Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 45,659 | 45,952
Accumulated amortization | (45,510) | (45,162)
Net | 149 | 790
License Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 0 | 2,440
Accumulated amortization | 0 | (2,440)
Net | 0 | 0
Patents and Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 11,993 | 11,667
Accumulated amortization | (10,560) | (9,799)
Net | 1,433 | 1,868
Customer Relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 18,609 | 18,894
Accumulated amortization | (15,915) | (15,445)
Net | 2,694 | 3,449
Non-compete Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 1,100 | 1,100
Accumulated amortization | (587) | (422)
Net | 513 | 678
Order Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 0 | 360
Accumulated amortization | 0 | (360)
Net | $ 0 | $ 0

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