Quarterly report pursuant to Section 13 or 15(d)

Debt and Financing Arrangements - Interest Rate Swap Contracts as Reflected on Balance Sheet (Details)

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Debt and Financing Arrangements - Interest Rate Swap Contracts as Reflected on Balance Sheet (Details) - Designated as Hedging Instrument - Interest Rate Swaps - USD ($)
$ in Thousands
Mar. 31, 2022
Sep. 30, 2021
Derivatives, Fair Value [Line Items]    
Total derivatives $ 5,318 $ (2,062)
Current Assets: Other Current Assets    
Derivatives, Fair Value [Line Items]    
Assets derivatives 1,426 31
Long-Term Assets: Other Assets    
Derivatives, Fair Value [Line Items]    
Assets derivatives 4,206 139
Current Liabilities: Other Current Liabilities    
Derivatives, Fair Value [Line Items]    
Liability derivatives (314) (1,922)
Long-Term Liabilities: Other Liabilities    
Derivatives, Fair Value [Line Items]    
Liability derivatives $ 0 $ (310)