v3.26.1
Investment in Derivative Instruments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Realized Gain (Loss) $ 1,388 $ 1,876 $ 4,425 $ 5,922  
Unrealized Gain (Loss) 71 0 71 0  
Total Gain (Loss) 1,459 1,876 4,496 5,922  
Net unrealized gain position 6,298   6,298   $ 7,916
Designated as Hedging Instrument | Cash Flow Hedging          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Unrealized Gain (Loss)     6,200   7,900
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | Interest rate swaps          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative asset, fair value 6,227   6,227   7,916
Location, Statement of Financial Position, Balance [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent | Commodity swap contracts          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative asset, fair value 71   71   $ 0
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Realized Gain (Loss) 26 0 26 0  
Unrealized Gain (Loss) 71 0 71 0  
Total Gain (Loss) 97 0 97 0  
Location, Statement of Income, Balance [Axis]: us-gaap:InterestExpenseNonoperating          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Realized Gain (Loss) 1,362 1,876 4,399 5,922  
Unrealized Gain (Loss) 0 0 0 0  
Total Gain (Loss) $ 1,362 $ 1,876 $ 4,399 $ 5,922