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Derivative Financial Instruments (Fair Values) (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($)
$ in Thousands
Sep. 30, 2020
Sep. 30, 2019
Derivatives, Fair Value [Line Items]    
Interest Rate Derivative Liabilities, at Fair Value $ 4,669  
Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Interest Rate Derivative Liabilities, at Fair Value 4,669 $ 0
Foreign Currency Cash Flow Hedge Liability at Fair Value 47 154
Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Interest Rate Derivative Assets, at Fair Value 0 19
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 133 $ 269