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Derivative Instruments - Power Derivative Transactions (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2026 USD ($) MMBTU MWh
Natural gas | 2026 |
Derivative [Line Items] |
Quantity | MMBTU | 3,066,000
Derivative, fair value, net | $ (2,752)
Natural gas | 2027 |
Derivative [Line Items] |
Quantity | MMBTU | 12,264,000
Derivative, fair value, net | $ 507
Power forwards - sales | 2026 |
Derivative [Line Items] |
Quantity | MWh | 438,000
Derivative, fair value, net | $ 5,959
Power forwards - sales | 2027 |
Derivative [Line Items] |
Quantity | MWh | 1,752,000
Derivative, fair value, net | $ 2,378
Heat rate call option | 2026 |
Derivative [Line Items] |
Quantity | MMBTU | 2,628,000
Derivative, fair value, net | $ 13,891
Power forwards - purchases | 2026 |
Derivative [Line Items] |
Quantity | MWh | 344,030
Derivative, fair value, net | $ (6,145)
Power forwards - purchases | 2027 |
Derivative [Line Items] |
Quantity | MWh | 87,600
Derivative, fair value, net | $ (735)

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