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Discontinued Operations, Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Sep. 30, 2021
Identifiable intangible assets with finite useful lives |  |
Intangible Assets, Net | $ 45,486 | $ 54,867
Minimum |  |
Identifiable intangible assets with finite useful lives |  |
Amortization Period | 1 year |
Maximum |  |
Identifiable intangible assets with finite useful lives |  |
Amortization Period | 11 years |
Customer Relationships |  |
Identifiable intangible assets with finite useful lives |  |
Gross Amount | $ 663,500 | 663,400
Accumulated Amortization | (618,000) | (608,500)
Intangible Assets, Net | $ 45,500 | $ 54,900

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