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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Purchase Contracts, Fiscal Year Maturity Schedule

The following table shows MGE Energy and MGE's future commitments related to purchase contracts as of March 31, 2018:

(In thousands)20182019202020212022Thereafter
Saratoga wind$13,578$858$2,266$1,775$1,784$4,429