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Fair Value Measurements (Reconciliation of Liability) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Change in fair value of contingent consideration $ 6,200 $ (5,772) $ 128
Secured Debt [Member]      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Change in fair value of contingent consideration (6,200) 5,772  
Fair Value, Inputs, Level 3      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Fair value at beginning of period 6,200 4,228  
Purchase price contingent consideration 0 6,200  
Contingent consideration payments 0 (10,000)  
Fair value at end of period $ 0 $ 6,200 $ 4,228