v3.26.1
Accounting for Derivative Instruments and Hedging Activities - Net Amount of Derivatives Reported in the Statement of Financial Position (Details) - Commodity Contract - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Gross Amount Recognized in the Statement of Financial Position $ 43,481 $ 48,709
Gross Amounts Offset in the Statement of Financial Position 0 0
Assets 43,481 48,709
Commodity Contracts (39,790) (44,271)
Cash Collateral Received 0 0
Net Amount 3,691 4,438
Liabilities:    
Gross Amount Recognized in the Statement of Financial Position 529,097 573,421
Gross Amounts Offset in the Statement of Financial Position 0 0
Derivative Liability 529,097 573,421
Commodity Contracts (39,790) (44,271)
Cash Collateral Posted (43,629) (54,521)
Net Amount $ 445,678 $ 474,629