Annual report pursuant to Section 13 and 15(d)

Investment in Derivative Instruments - Balance Sheet Classification (Details)

v3.23.3
Investment in Derivative Instruments - Balance Sheet Classification (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Net unrealized gain (loss) position $ (27,093) $ (25,245)
Designated cash flow hedge 26,900 24,700
Prepaid expenses and other current assets - commodity swaps | Commodity swap contracts    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative asset, fair value, gross assets 204 1,032
Other assets | Commodity swap contracts    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative asset, fair value, gross assets 0 155
Other assets | Interest rate swaps    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative asset, fair value, gross assets 26,909 24,719
Accrued expense and other current liabilities - commodity swaps | Commodity swap contracts    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative liability, fair value, gross liability (20) (601)
Other long-term liabilities - commodity swaps | Commodity swap contracts    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative liability, fair value, gross liability $ 0 $ (60)