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Discontinued Operations, Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Identifiable intangible assets with finite useful lives    
Intangible Assets, Net $ 31,290 $ 35,552
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 $ 663,400 663,000
Accumulated Amortization (632,100) (627,400)
Intangible Assets, Net $ 31,300 $ 35,600