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Goodwill and Intangible Assets Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 107,767	$ 107,767
Finite-Lived Intangible Assets, Accumulated Amortization	(65,381)	(61,877)
Intangible Assets, Net (Excluding Goodwill)	42,386	45,890
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	13,821	13,821
Finite-Lived Intangible Assets, Accumulated Amortization	(7,329)	(6,964)
Intangible Assets, Net (Excluding Goodwill)	$ 6,492	$ 6,857
Trademarks and Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Trademarks and Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years	20 years
Technical Library
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years	20 years
Finite-Lived Intangible Assets, Gross	$ 400	$ 400
Finite-Lived Intangible Assets, Accumulated Amortization	(226)	(221)
Intangible Assets, Net (Excluding Goodwill)	174	179
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	92,796	92,796
Finite-Lived Intangible Assets, Accumulated Amortization	(57,506)	(54,478)
Intangible Assets, Net (Excluding Goodwill)	$ 35,290	$ 38,318
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year	1 year
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years	15 years
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Finite-Lived Intangible Assets, Gross	$ 750	$ 750
Finite-Lived Intangible Assets, Accumulated Amortization	(320)	(214)
Intangible Assets, Net (Excluding Goodwill)	$ 430	$ 536
Backlog [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		1 year
Backlog [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years	2 years

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