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Commitments and Contingencies (Details-2)
$ in Thousands
Jun. 30, 2022
USD ($)
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2022 $ 52,748
Purchase obligation, 2023 82,682
Purchase obligation, 2024 47,794
Purchase obligation, 2025 42,028
Purchase obligation, 2026 22,791
Purchase obligation, Thereafter 15,490
Coal [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2022 15,366 [1]
Purchase obligation, 2023 21,604 [1]
Purchase obligation, 2024 11,685 [1]
Purchase obligation, 2025 5,919 [1]
Purchase obligation, 2026 0 [1]
Purchase obligation, Thereafter 0 [1]
Natural Gas, Transportation and Storage [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2022 14,156 [2]
Purchase obligation, 2023 36,109 [2]
Purchase obligation, 2024 36,109 [2]
Purchase obligation, 2025 36,109 [2]
Purchase obligation, 2026 22,791 [2]
Purchase obligation, Thereafter 15,490 [2]
Natual Gas, Supply [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2022 23,226 [3]
Purchase obligation, 2023 24,969 [3]
Purchase obligation, 2024 0 [3]
Purchase obligation, 2025 0 [3]
Purchase obligation, 2026 0 [3]
Purchase obligation, Thereafter $ 0 [3]
[1] Total coal commitments for 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 established by FERC but may be subject to change.
[3] These commitments include market-based pricing.