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Commitments and Contingencies (Details-2)
$ in Thousands
Sep. 30, 2024
USD ($)
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2024 $ 29,597
Purchase obligation, 2025 59,831
Purchase obligation, 2026 19,243
Purchase obligation, 2027 2,546
Purchase obligation, 2028 2,546
Purchase obligation, Thereafter 11,224
Coal [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2024 10,902 [1]
Purchase obligation, 2025 19,894 [1]
Purchase obligation, 2026 3,751 [1]
Purchase obligation, 2027 0 [1]
Purchase obligation, 2028 0 [1]
Purchase obligation, Thereafter 0 [1]
Natural Gas [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2024 18,695 [2]
Purchase obligation, 2025 39,937 [2]
Purchase obligation, 2026 15,492 [2]
Purchase obligation, 2027 2,546 [2]
Purchase obligation, 2028 2,546 [2]
Purchase obligation, Thereafter $ 11,224 [2]
[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.