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Goodwill and other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 225,059 | $ 121,093
Accumulated amortization | (103,811) | (90,426)
Net | 121,248 | 30,667
Purchased and Core Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 76,011 | 57,699
Accumulated amortization | (55,482) | (50,986)
Net | 20,529 | 6,713
License Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 112 | 102
Accumulated amortization | (112) | (74)
Net | 0 | 28
Patents and Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 22,836 | 14,577
Accumulated amortization | (13,535) | (11,970)
Net | 9,301 | 2,607
Customer Relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 125,500 | 46,315
Accumulated amortization | (34,232) | (25,266)
Net | 91,268 | 21,049
Non-compete Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 600 | 600
Accumulated amortization | (450) | (330)
Net | 150 | 270
Order backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 0 | 1,800
Accumulated amortization | 0 | (1,800)
Net | $ 0 | $ 0

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