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Commitments and Contingencies (Details-2) $ in Thousands | Dec. 31, 2025 USD ($)
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Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
Purchase obligation due in next twelve months | $ 91,181 |
Purchase obligation due in second year | 76,450 |
Purchase obligation due in third year | 72,867 |
Purchase obligation due in fourth year | 63,476 |
Purchase obligation due in fifth year | 63,440 |
Purchase obligation due thereafter | 350,537 |
Coal [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
Purchase obligation due in next twelve months | 15,564 | [1]
Purchase obligation due in second year | 8,207 | [1]
Purchase obligation due in third year | 6,349 | [1]
Purchase obligation due in fourth year | 0 | [1]
Purchase obligation due in fifth year | 0 | [1]
Purchase obligation due thereafter | 0 | [1]
Natural Gas [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
Purchase obligation due in next twelve months | 52,875 | [2]
Purchase obligation due in second year | 56,266 | [2]
Purchase obligation due in third year | 61,430 | [2]
Purchase obligation due in fourth year | 61,249 | [2]
Purchase obligation due in fifth year | 61,199 | [2]
Purchase obligation due thereafter | 312,947 | [2]
Purchased Power [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
Purchase obligation due in next twelve months | 5,980 | [3]
Purchase obligation due in second year | 5,795 | [3]
Purchase obligation due in third year | 258 | [3]
Purchase obligation due in fourth year | 0 | [3]
Purchase obligation due in fifth year | 0 | [3]
Purchase obligation due thereafter | 0 | [3]
Renewable energy [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
Purchase obligation due in next twelve months | 7,369 | [4]
Purchase obligation due in second year | 3,403 | [4]
Purchase obligation due in third year | 3,434 | [4]
Purchase obligation due in fourth year | 1,385 | [4]
Purchase obligation due in fifth year | 1,413 | [4]
Purchase obligation due thereafter | 36,370 | [4]
Other [Member] |  |
Purchase Obligation, Fiscal Year Maturity [Abstract] |  |
Purchase obligation due in next twelve months | 9,393 |
Purchase obligation due in second year | 2,779 |
Purchase obligation due in third year | 1,396 |
Purchase obligation due in fourth year | 842 |
Purchase obligation due in fifth year | 828 |
Purchase obligation due thereafter | $ 1,220 |
[1] | Total coal commitments for MGE's share of the Columbia and Elm Road Units, including transportation. Fuel procurement for MGE's jointly owned Columbia and Elm Road Units is handled by WPL and WEPCO, respectively, who are the operators of those facilities.
[2] | MGE's natural gas transportation and storage contracts require fixed monthly payments for firm supply pipeline transportation and storage capacity. The pricing components of the fixed monthly payments for the transportation and storage contracts are approved by FERC but may be subject to change. MGE's natural gas supply commitments include market-based pricing.
[3] | MGE has a purchase power agreement to help meet future electric supply requirements.
[4] | Operational commitments for solar and wind facilities.

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