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Commitments and Contingencies (Details-2)
$ in Thousands
Jun. 30, 2023
USD ($)
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2023 $ 42,921
Purchase obligation, 2024 64,416
Purchase obligation, 2025 39,943
Purchase obligation, 2026 17,741
Purchase obligation, 2027 2,165
Purchase obligation, Thereafter 11,995
Coal [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2023 20,814 [1]
Purchase obligation, 2024 23,039 [1]
Purchase obligation, 2025 14,426 [1]
Purchase obligation, 2026 2,868 [1]
Purchase obligation, 2027 0 [1]
Purchase obligation, Thereafter 0 [1]
Natural Gas [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2023 22,107 [2]
Purchase obligation, 2024 41,377 [2]
Purchase obligation, 2025 25,517 [2]
Purchase obligation, 2026 14,873 [2]
Purchase obligation, 2027 2,165 [2]
Purchase obligation, Thereafter $ 11,995 [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.