Equity and Financing Arrangements	6 Months Ended
Jun. 30, 2025
Equity and Financing Arrangements Disclosure [Abstract]
Equity and Financing Arrangements	Equity and Financing Arrangements - MGE Energy. a. Common Stock. MGE Energy sells shares of its common stock through its Direct Stock Purchase and Dividend Reinvestment Plan (the Stock Plan). Those shares may be newly issued shares or shares that are purchased in the open market by an independent agent for participants in the Stock Plan. Effective May 2025, MGE Energy transitioned to utilizing open market purchases for all shares issued under the Stock Plan. Sales of newly issued shares under the Stock Plan are covered by a shelf registration statement that MGE Energy filed with the SEC. During the six months ended June 30, 2025, MGE Energy issued approximately 40,995 shares of common stock under the Stock Plan. The net proceeds from these issuances were approximately $3.8 million, which were used for general corporate purposes. b. Dilutive Shares Calculation. As of June 30, 2025, 30,803 shares were included in the calculation of diluted earnings per share related to nonvested equity awards. See Footnote 7 for additional information on share-based compensation awards.

Equity and Financing Arrangements

6 Months Ended

Jun. 30, 2025

Equity and Financing Arrangements Disclosure [Abstract]

Equity and Financing Arrangements - MGE Energy.

Common Stock.

MGE Energy sells shares of its common stock through its Direct Stock Purchase and Dividend Reinvestment Plan (the Stock Plan). Those shares may be newly issued shares or shares that are purchased in the open market by an independent agent for participants in the Stock Plan. Effective May 2025, MGE Energy transitioned to utilizing open market purchases for all shares issued under the Stock Plan. Sales of newly issued shares under the Stock Plan are covered by a shelf registration statement that MGE Energy filed with the SEC. During the six months ended June 30, 2025, MGE Energy issued approximately 40,995 shares of common stock under the Stock Plan. The net proceeds from these issuances were approximately $3.8 million, which were used for general corporate purposes.

Dilutive Shares Calculation.

As of June 30, 2025, 30,803 shares were included in the calculation of diluted earnings per share related to nonvested equity awards. See Footnote 7 for additional information on share-based compensation awards.