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Goodwill and Intangible Assets Intangibles (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 111,445 | $ 117,359
Finite-Lived Intangible Assets, Accumulated Amortization | (50,978) | (45,423)
Intangible Assets, Net (Excluding Goodwill) | 60,467 | 71,936
Trademarks and Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 14,621 | 15,262
Finite-Lived Intangible Assets, Accumulated Amortization | (5,417) | (4,589)
Intangible Assets, Net (Excluding Goodwill) | $ 9,204 | $ 10,673
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 | (196) | (181)
Intangible Assets, Net (Excluding Goodwill) | 204 | 219
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 91,426 | 96,699
Finite-Lived Intangible Assets, Accumulated Amortization | (40,368) | (35,662)
Intangible Assets, Net (Excluding Goodwill) | $ 51,058 | $ 61,037
Customer Relationships [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 6 years | 6 years
Customer Relationships [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 15 years | 15 years
Noncompete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 5 years | 5 years
Finite-Lived Intangible Assets, Gross | $ 40 | $ 40
Finite-Lived Intangible Assets, Accumulated Amortization | (39) | (33)
Intangible Assets, Net (Excluding Goodwill) | $ 1 | $ 7
Backlog [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 1 year | 1 year
Finite-Lived Intangible Assets, Gross | $ 4,958 | $ 4,958
Finite-Lived Intangible Assets, Accumulated Amortization | (4,958) | (4,958)
Intangible Assets, Net (Excluding Goodwill) | $ 0 | $ 0

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