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Financial Instruments and Risk Management - Fair Value of Partnership's Recognized Derivative Assets and Liabilities on a Gross Basis and Amounts Offset on Condensed Consolidated Balance Sheets (Details) - Commodity-Related Derivatives [Member] - USD ($)
$ in Thousands
Mar. 30, 2024
Sep. 30, 2023
Asset Derivatives [Abstracts]    
Gross amounts $ 12,368 $ 35,339
Effects of netting (4,543) (16,793)
Net amounts presented in the balance sheet 7,825 18,546
Liability Derivatives [Abstracts]    
Gross amounts 7,793 24,004
Effects of netting (4,543) (16,793)
Net amounts presented in the balance sheet $ 3,250 $ 7,211