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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |  |  |
Pay vs Performance Disclosure, Table |  |
Pay Versus Performance
|  |  |  |  | Value of Initial Fixed $100 Investment Based on: |  | Company Selected Measure
Year (a) | Summary Compensation Table Total for PEO ($)(1) (b) | Compensation Actually Paid to PEO ($)(2)(3) (c) | Average Summary Compensation Table Total for Non-PEO NEOs ($)(4) (d) | Average Compensation Actually Paid to Non-PEO NEOs ($)(2)(4)(5) (e) | Total Shareholder Return ($) (f) | Peer Group Total Shareholder Return ($)(6) (g) | Net Income ($) (h) | Earnings Per Share - Basic and Diluted ($)(7) (i)
2024 | 2,126,131 | 3,303,145 | 855,983 | 1,138,299 | 133 | 127 | 120,569,000 | 3.33
2023 | 2,566,797 | 2,206,732 | 895,191 | 838,196 | 100 | 107 | 117,699,000 | 3.25
2022 | 1,678,867 | 1,590,003 | 797,155 | 731,318 | 95 | 117 | 110,952,000 | 3.07
2021 | 2,628,028 | 2,189,827 | 863,501 | 766,775 | 109 | 116 | 105,761,000 | 2.92
2020 | 2,711,113 | 1,522,389 | 1,589,557 | 709,072 | 91 | 99 | 92,418,000 | 2.60
(1) Reflects amounts reported in the "Summary Compensation Table" for J. Keebler (PEO). (2) Compensation Actually Paid (CAP) includes adjustments in accordance with the SEC methodology to the total executive compensation reported from the summary compensation table. The adjustments include a deduction for actuarial present value of accumulated benefit of all defined benefit and actuarial pension plans reported in the summary compensation table; addition of actuarially determined service costs for services rendered by the executive during the covered fiscal period, deduction of grant date fair value of equity award amounts reported in the summary compensation table; and addition or subtraction of the change in fair value of the equity awards unvested and vested during the fiscal period. The calculation of "compensation actually paid" is prescribed by SEC rules and does not represent the compensation actually received by the named executive officers for any time period shown above. (3) To calculate CAP for the PEO, the following adjustments were made to the Summary Compensation Table total compensation, calculated in accordance with the SEC methodology for determining CAP for 2024:
Year | Deduction for Actuarial Pension Present Value | Addition for Service Cost for Pension | Deduction of Grant Date Fair Value of Awards Granted in FY | Addition of Fair Value of Equity Awards Granted in FY | Change in Fair Value of Prior Years’ Unvested Equity Awards | Change in Fair Value of Prior Years’ Awards Vested in FY | Total Adjustment to CAP
2024 | — | 161,310 | (703,219) | 1,168,032 | 204,985 | 345,906 | 1,177,014
(4) For fiscal years 2020 through 2024, J. Bushek, L. Hobbie, and C.A. Renlund are included as other named executive officers. In addition, J. Lorenz is included for fiscal year 2024; T. Johnson is included for fiscal years 2020 through 2023. D. Peterson is included for fiscal year 2021 and J. Newman is included for fiscal year 2020. (5) To calculate CAP for the average named executive officers, the following average adjustments were made to Summary Compensation Table total compensation, calculated in accordance with the SEC methodology for determining CAP for 2024:
Year | Deduction for Actuarial Pension Present Value | Addition for Service Cost for Pension | Deduction of Grant Date Fair Value of Awards Granted in FY | Addition of Fair Value of Equity Awards Granted in FY | Change in Fair Value of Prior Years’ Unvested Equity Awards | Change in Fair Value of Prior Years’ Awards Vested in FY | Total Adjustment to CAP
2024 | (17,440) | — | (196,853) | 326,967 | 64,692 | 104,950 | 282,316
(6) Peer Group Total Shareholder Return of the Edison Electric Institute (EEI) Index companies, which is the index used for purposes of the Company’s disclosure under Item 201(e) of Regulation S-K. (7) The Company determined that EPS is the most important financial performance measure used to link CAP to Company performance given that it is utilized as a component of the 2024 STI and the 2024 PSU awards granted to the NEOs. |  |  |  |
Named Executive Officers, Footnote |  | (4) For fiscal years 2020 through 2024, J. Bushek, L. Hobbie, and C.A. Renlund are included as other named executive officers. In addition, J. Lorenz is included for fiscal year 2024; T. Johnson is included for fiscal years 2020 through 2023. D. Peterson is included for fiscal year 2021 and J. Newman is included for fiscal year 2020. |  |  |  |
Peer Group Issuers, Footnote |  | Peer Group Total Shareholder Return of the Edison Electric Institute (EEI) Index companies, which is the index used for purposes of the Company’s disclosure under Item 201(e) of Regulation S-K |  |  |  |
PEO Total Compensation Amount | [1] | $ 2,126,131 | $ 2,566,797 | $ 1,678,867 | $ 2,628,028 | $ 2,711,113
PEO Actually Paid Compensation Amount | [2],[3] | $ 3,303,145 | 2,206,732 | 1,590,003 | 2,189,827 | 1,522,389
Adjustment To PEO Compensation, Footnote |  | (3) To calculate CAP for the PEO, the following adjustments were made to the Summary Compensation Table total compensation, calculated in accordance with the SEC methodology for determining CAP for 2024:
Year | Deduction for Actuarial Pension Present Value | Addition for Service Cost for Pension | Deduction of Grant Date Fair Value of Awards Granted in FY | Addition of Fair Value of Equity Awards Granted in FY | Change in Fair Value of Prior Years’ Unvested Equity Awards | Change in Fair Value of Prior Years’ Awards Vested in FY | Total Adjustment to CAP
2024 | — | 161,310 | (703,219) | 1,168,032 | 204,985 | 345,906 | 1,177,014
Non-PEO NEO Average Total Compensation Amount | [4] | $ 855,983 | 895,191 | 797,155 | 863,501 | 1,589,557
Non-PEO NEO Average Compensation Actually Paid Amount | [2],[4],[5] | $ 1,138,299 | 838,196 | 731,318 | 766,775 | 709,072
Adjustment to Non-PEO NEO Compensation Footnote |  | (5) To calculate CAP for the average named executive officers, the following average adjustments were made to Summary Compensation Table total compensation, calculated in accordance with the SEC methodology for determining CAP for 2024:
Year | Deduction for Actuarial Pension Present Value | Addition for Service Cost for Pension | Deduction of Grant Date Fair Value of Awards Granted in FY | Addition of Fair Value of Equity Awards Granted in FY | Change in Fair Value of Prior Years’ Unvested Equity Awards | Change in Fair Value of Prior Years’ Awards Vested in FY | Total Adjustment to CAP
2024 | (17,440) | — | (196,853) | 326,967 | 64,692 | 104,950 | 282,316
Compensation Actually Paid vs. Net Income |  | The chart below illustrates the relationship of executive compensation actually paid and Net Income. |  |  |  |
Compensation Actually Paid vs. Company Selected Measure |  | The chart below illustrates the relationship of executive compensation actually paid and Earnings Per Share (EPS). |  |  |  |
Total Shareholder Return Vs Peer Group |  | The chart below illustrates the relationship of executive compensation actually paid and MGE Energy Total Shareholder Return (TSR). Also included is the relationship of MGE Energy TSR and peer group TSR. |  |  |  |
Tabular List, Table |  | The following table identifies the financial and non-financial most important performance measures used by our Human Resources and Compensation Committee to link compensation actually paid to our NEOs to Company performance. See further discussion in the Compensation Discussion and Analysis for description of metrics and impact to executive compensation.
Performance Measures
Earnings Per Share
Return on Equity
Relative Total Shareholder Return
Customer Satisfaction Rating
Service Reliability
Total Shareholder Return Amount |  | $ 133 | 100 | 95 | 109 | 91
Peer Group Total Shareholder Return Amount | [6] | 127 | 107 | 117 | 116 | 99
Net Income (Loss) |  | $ 120,569,000 | $ 117,699,000 | $ 110,952,000 | $ 105,761,000 | $ 92,418,000
Company Selected Measure Amount | [7] | 3.33 | 3.25 | 3.07 | 2.92 | 2.6
PEO Name |  | J. Keebler (PEO) |  |  |  |
Measure:: 1 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  | Earnings Per Share |  |  |  |
Measure:: 2 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  | Return on Equity |  |  |  |
Measure:: 3 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  | Relative Total Shareholder Return |  |  |  |
Measure:: 4 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  | Customer Satisfaction Rating |  |  |  |
Measure:: 5 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  | Service Reliability |  |  |  |
PEO |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | $ 1,177,014 |  |  |  |
PEO | Deduction for Actuarial Pension Present Value [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 0 |  |  |  |
PEO | Addition for Service Cost for Pension [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 161,310 |  |  |  |
PEO | Deduction Grant Date Fair Value of Awards Granted in FY [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | (703,219) |  |  |  |
PEO | Addition of Fair Value of Equity Awards Granted in FY [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 1,168,032 |  |  |  |
PEO | Change in Fair Value of Prior Years Unvested Equity Awards [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 204,985 |  |  |  |
PEO | Change in Fair Value of Prior Years Awards Vested in FY [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 345,906 |  |  |  |
Non-PEO NEO |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 282,316 |  |  |  |
Non-PEO NEO | Deduction for Actuarial Pension Present Value [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | (17,440) |  |  |  |
Non-PEO NEO | Addition for Service Cost for Pension [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 0 |  |  |  |
Non-PEO NEO | Deduction Grant Date Fair Value of Awards Granted in FY [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | (196,853) |  |  |  |
Non-PEO NEO | Addition of Fair Value of Equity Awards Granted in FY [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 326,967 |  |  |  |
Non-PEO NEO | Change in Fair Value of Prior Years Unvested Equity Awards [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | 64,692 |  |  |  |
Non-PEO NEO | Change in Fair Value of Prior Years Awards Vested in FY [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  | $ 104,950 |  |  |  |
[1] | Reflects amounts reported in the "Summary Compensation Table" for J. Keebler (PEO).
[2] | Compensation Actually Paid (CAP) includes adjustments in accordance with the SEC methodology to the total executive compensation reported from the summary compensation table. The adjustments include a deduction for actuarial present value of accumulated benefit of all defined benefit and actuarial pension plans reported in the summary compensation table; addition of actuarially determined service costs for services rendered by the executive during the covered fiscal period, deduction of grant date fair value of equity award amounts reported in the summary compensation table; and addition or subtraction of the change in fair value of the equity awards unvested and vested during the fiscal period. The calculation of "compensation actually paid" is prescribed by SEC rules and does not represent the compensation actually received by the named executive officers for any time period shown above.
[3] | To calculate CAP for the PEO, the following adjustments were made to the Summary Compensation Table total compensation, calculated in accordance with the SEC methodology for determining CAP for 2024:
Year | Deduction for Actuarial Pension Present Value | Addition for Service Cost for Pension | Deduction of Grant Date Fair Value of Awards Granted in FY | Addition of Fair Value of Equity Awards Granted in FY | Change in Fair Value of Prior Years’ Unvested Equity Awards | Change in Fair Value of Prior Years’ Awards Vested in FY | Total Adjustment to CAP
2024 | — | 161,310 | (703,219) | 1,168,032 | 204,985 | 345,906 | 1,177,014
[4] | For fiscal years 2020 through 2024, J. Bushek, L. Hobbie, and C.A. Renlund are included as other named executive officers. In addition, J. Lorenz is included for fiscal year 2024; T. Johnson is included for fiscal years 2020 through 2023. D. Peterson is included for fiscal year 2021 and J. Newman is included for fiscal year 2020.
[5] | To calculate CAP for the average named executive officers, the following average adjustments were made to Summary Compensation Table total compensation, calculated in accordance with the SEC methodology for determining CAP for 2024:
Year | Deduction for Actuarial Pension Present Value | Addition for Service Cost for Pension | Deduction of Grant Date Fair Value of Awards Granted in FY | Addition of Fair Value of Equity Awards Granted in FY | Change in Fair Value of Prior Years’ Unvested Equity Awards | Change in Fair Value of Prior Years’ Awards Vested in FY | Total Adjustment to CAP
2024 | (17,440) | — | (196,853) | 326,967 | 64,692 | 104,950 | 282,316
[6] | Peer Group Total Shareholder Return of the Edison Electric Institute (EEI) Index companies, which is the index used for purposes of the Company’s disclosure under Item 201(e) of Regulation S-K.
[7] | The Company determined that EPS is the most important financial performance measure used to link CAP to Company performance given that it is utilized as a component of the 2024 STI and the 2024 PSU awards granted to the NEOs.

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