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Commitments and Contingencies (Details-2)
$ in Thousands
Sep. 30, 2020
USD ($)
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2020 $ 21,182
Purchase obligation, 2021 40,826
Purchase obligation, 2022 28,447
Purchase obligation, 2023 23,523
Purchase obligation, 2024 22,008
Purchase obligation, Thereafter 36,603
Coal [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2020 6,381 [1]
Purchase obligation, 2021 6,405 [1]
Purchase obligation, 2022 6,439 [1]
Purchase obligation, 2023 1,515 [1]
Purchase obligation, 2024 0 [1]
Purchase obligation, Thereafter 0 [1]
Natural Gas, Transportation and Storage [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2020 6,260 [2]
Purchase obligation, 2021 21,854 [2]
Purchase obligation, 2022 22,008 [2]
Purchase obligation, 2023 22,008 [2]
Purchase obligation, 2024 22,008 [2]
Purchase obligation, Thereafter 36,603 [2]
Natual Gas, Supply [Member]  
Operating expense purchase contracts [Abstract]  
Purchase obligation, 2020 8,541 [3]
Purchase obligation, 2021 12,567 [3]
Purchase obligation, 2022 0 [3]
Purchase obligation, 2023 0 [3]
Purchase obligation, 2024 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 andstorage contracts are established by FERC but may be subject to change.
[3] These commitments include market-based pricing.