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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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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
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