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Discontinued Operations, Goodwill, and Intangible Assets - Intangible assets (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Discontinued Operations, Goodwill and Intangible Assets |  |
Intangible Assets, Net | $ 6,932 | $ 17,769
Customer relationships |  |
Discontinued Operations, Goodwill and Intangible Assets |  |
Gross Amount | 671,700 | 663,800
Accumulated Amortization | (664,800) | (646,000)
Intangible Assets, Net | $ 6,900 | $ 17,800
Customer relationships | Minimum |  |
Discontinued Operations, Goodwill and Intangible Assets |  |
Amortization Period | 1 year |
Customer relationships | Maximum |  |
Discontinued Operations, Goodwill and Intangible Assets |  |
Amortization Period | 11 years |

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