Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Debt - Interest Rate Swap Contracts as Reflected on Balance Sheet (Details) - Designated as Hedging Instrument - Interest Rate Swaps - USD ($)
$ in Thousands
Mar. 31, 2021
Sep. 30, 2020
Derivatives, Fair Value [Line Items]    
Total derivatives $ (2,905) $ (7,792)
Current Assets: Other Current Assets    
Derivatives, Fair Value [Line Items]    
Assets derivatives 78 0
Long-Term Assets: Other Assets    
Derivatives, Fair Value [Line Items]    
Assets derivatives 393 0
Current Liabilities: Other Current Liabilities    
Derivatives, Fair Value [Line Items]    
Liability derivatives (2,425) (3,164)
Long-Term Liabilities: Other Liabilities    
Derivatives, Fair Value [Line Items]    
Liability derivatives $ (951) $ (4,628)