| Intangibles - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Sep. 30, 2024 | 
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | $ 33,285 | $ 34,485 | 
| Less: Accumulated amortization | (9,438) | (9,382) | 
| Total intangibles, net | 23,847 | 25,103 | 
| Intangible assets - Tradenames | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | 15,356 | 15,356 | 
| Intangible assets - Customer relationships | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | 13,599 | 14,799 | 
| Intangible assets - Other | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | $ 4,330 | $ 4,330 | 
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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