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Commitments and Contingencies (Details-2) - Coal [Member] $ in Thousands | Jun. 30, 2026 USD ($) | [1]
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Operating expense purchase contracts [Abstract] |
Purchase obligation, 2026 | $ 19,327
Purchase obligation, 2027 | 12,157
Purchase obligation, 2028 | 7,927
Purchase obligation, 2029 | 0
Purchase obligation, 2030 | 0
Purchase obligation, Thereafter | $ 0
[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 Wisconsin Power and Light Company and WEPCO, respectively, who are the operators of those facilities.

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