{
  "cik": 1161728,
  "cik_padded": "0001161728",
  "entityName": "MGE ENERGY INC",
  "fiscal_years": [
    {
      "accn": "0001193125-26-067036",
      "filed": "2026-02-24",
      "fiscal_year": 2025,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 343220000.0,
        "cash": 5666000.0,
        "dividends_paid": 67587000.0,
        "eps_diluted": 3.72,
        "free_cash_flow": -79986000.0,
        "net_income": 135889000.0,
        "operating_cash_flow": 263234000.0,
        "operating_income": 170653000.0,
        "revenue": 743654000.0,
        "stockholders_equity": 1303936000.0,
        "total_assets": 3155420000.0
      },
      "period_end": "2025-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.18273148534130124,
        "operating_margin": 0.22947903191538,
        "payout_ratio": 0.4973691763130202,
        "revenue_growth_yoy": 0.09854581767472642,
        "roa_avg2y": 0.045422160287690284,
        "roa_period_end": 0.04306526547971426,
        "roe_avg2y": 0.1072494331262623,
        "roe_period_end": 0.10421447064886619
      }
    },
    {
      "accn": "0001193125-26-067036",
      "filed": "2026-02-24",
      "fiscal_year": 2024,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 236925000.0,
        "cash": 21302000.0,
        "dividends_paid": 63596000.0,
        "eps_diluted": 3.33,
        "free_cash_flow": 40859000.0,
        "net_income": 120569000.0,
        "operating_cash_flow": 277784000.0,
        "operating_income": 146262000.0,
        "revenue": 676944000.0,
        "stockholders_equity": 1230138000.0,
        "total_assets": 2827959000.0
      },
      "period_end": "2024-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.1781077903046633,
        "operating_margin": 0.21606218535063462,
        "payout_ratio": 0.5274656006104388,
        "revenue_growth_yoy": -0.019534175029800226,
        "roa_avg2y": 0.043816051009763574,
        "roa_period_end": 0.04263463508487923,
        "roe_avg2y": 0.10173693396916983,
        "roe_period_end": 0.09801258070232771
      }
    },
    {
      "accn": "0001193125-26-067036",
      "filed": "2026-02-24",
      "fiscal_year": 2023,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 222071000.0,
        "cash": 11140000.0,
        "dividends_paid": 60393000.0,
        "eps_diluted": 3.25,
        "free_cash_flow": 15490000.0,
        "net_income": 117699000.0,
        "operating_cash_flow": 237561000.0,
        "operating_income": 146385000.0,
        "revenue": 690431000.0,
        "stockholders_equity": 1140073000.0,
        "total_assets": 2675458000.0
      },
      "period_end": "2023-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.1704717777735936,
        "operating_margin": 0.21201973839529223,
        "payout_ratio": 0.5131139601865776,
        "revenue_growth_yoy": -0.03371218959887701,
        "roa_avg2y": 0.04532936085058168,
        "roa_period_end": 0.04399209406389486,
        "roe_avg2y": 0.10595175778340198,
        "roe_period_end": 0.10323812597965216
      }
    },
    {
      "accn": "0001193125-26-067036",
      "filed": "2026-02-24",
      "fiscal_year": 2022,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 175030000.0,
        "cash": 11604000.0,
        "dividends_paid": 57500000.0,
        "eps_diluted": 3.07,
        "free_cash_flow": -21295000.0,
        "net_income": 110952000.0,
        "operating_cash_flow": 153735000.0,
        "operating_income": 137743000.0,
        "revenue": 714519000.0,
        "stockholders_equity": 1081674000.0,
        "total_assets": 2517600000.0
      },
      "period_end": "2022-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.1552820848710811,
        "operating_margin": 0.19277723895375773,
        "payout_ratio": 0.5182421227197347,
        "revenue_growth_yoy": 0.1779390818089498,
        "roa_avg2y": 0.04538372588151032,
        "roa_period_end": 0.044070543374642515,
        "roe_avg2y": 0.10521055481328427,
        "roe_period_end": 0.10257434310152597
      }
    },
    {
      "accn": "0000950170-25-026262",
      "filed": "2025-02-25",
      "fiscal_year": 2021,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 153169000.0,
        "cash": 17438000.0,
        "dividends_paid": 54788000.0,
        "eps_diluted": 2.92,
        "free_cash_flow": -15642000.0,
        "net_income": 105761000.0,
        "operating_cash_flow": 137527000.0,
        "operating_income": 117294000.0,
        "revenue": 606584000.0,
        "stockholders_equity": 1027468000.0,
        "total_assets": 2371906000.0
      },
      "period_end": "2021-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.1743550769555412,
        "operating_margin": 0.19336810730253354,
        "payout_ratio": 0.5180359489793024,
        "revenue_growth_yoy": 0.12615454307478377,
        "roa_avg2y": 0.04572897923428465,
        "roa_period_end": 0.04458903514726131,
        "roe_avg2y": 0.1055779278730681,
        "roe_period_end": 0.10293361934386278
      }
    },
    {
      "accn": "0000950170-24-017706",
      "filed": "2024-02-21",
      "fiscal_year": 2020,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 203139000.0,
        "cash": 44738000.0,
        "dividends_paid": 51729000.0,
        "eps_diluted": 2.6,
        "free_cash_flow": -30696000.0,
        "net_income": 92418000.0,
        "operating_cash_flow": 172443000.0,
        "operating_income": 109997000.0,
        "revenue": 538633000.0,
        "stockholders_equity": 976000000.0,
        "total_assets": 2253651000.0
      },
      "period_end": "2020-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.17157879298149203,
        "operating_margin": 0.20421511492983163,
        "payout_ratio": 0.5597286242939687,
        "revenue_growth_yoy": -0.0531277742131123,
        "roa_avg2y": 0.042634964241352706,
        "roa_period_end": 0.04100812415054505,
        "roe_avg2y": 0.10091085978087828,
        "roe_period_end": 0.09469057377049181
      }
    },
    {
      "accn": "0000950170-23-003632",
      "filed": "2023-02-22",
      "fiscal_year": 2019,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 164036000.0,
        "cash": 23481000.0,
        "dividends_paid": 47842000.0,
        "eps_diluted": 2.51,
        "free_cash_flow": -33561000.0,
        "net_income": 86874000.0,
        "operating_cash_flow": 130475000.0,
        "operating_income": 110910000.0,
        "revenue": 568855000.0,
        "stockholders_equity": 855676000.0,
        "total_assets": 2081664000.0
      },
      "period_end": "2019-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.15271730054231747,
        "operating_margin": 0.19497059883450088,
        "payout_ratio": 0.5507056196330318,
        "revenue_growth_yoy": 0.016233511025996485,
        "roa_avg2y": 0.0426869686178992,
        "roa_period_end": 0.04173295978601734,
        "roe_avg2y": 0.10389638346727899,
        "roe_period_end": 0.10152674610483407
      }
    },
    {
      "accn": "0001161728-21-000013",
      "filed": "2022-02-23",
      "fiscal_year": 2018,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 212197000.0,
        "cash": 83102000.0,
        "dividends_paid": 45762000.0,
        "free_cash_flow": -59157000.0,
        "net_income": 84219000.0,
        "operating_cash_flow": 153040000.0,
        "operating_income": 114207000.0,
        "revenue": 559768000.0,
        "stockholders_equity": 816644000.0,
        "total_assets": 1988618000.0
      },
      "period_end": "2018-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.15045340212373698,
        "operating_margin": 0.2040255963184748,
        "payout_ratio": 0.5433690734869804,
        "revenue_growth_yoy": -0.005915478450503375,
        "roa_avg2y": 0.043820698267339614,
        "roa_period_end": 0.04235051679105792,
        "roe_avg2y": 0.10561495230529128,
        "roe_period_end": 0.10312816845528774
      }
    },
    {
      "accn": "0001161728-21-000013",
      "filed": "2021-02-24",
      "fiscal_year": 2017,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 108131000.0,
        "cash": 107952000.0,
        "dividends_paid": 43682000.0,
        "free_cash_flow": 23242000.0,
        "net_income": 97606000.0,
        "operating_cash_flow": 131373000.0,
        "operating_income": 124625000.0,
        "revenue": 563099000.0,
        "stockholders_equity": 778187000.0,
        "total_assets": 1855182000.0
      },
      "period_end": "2017-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.17333719292699862,
        "operating_margin": 0.22131987448033116,
        "payout_ratio": 0.44753396307604043,
        "revenue_growth_yoy": 0.03369282875473845,
        "roa_avg2y": 0.053391433061597125,
        "roa_period_end": 0.05261262776374501,
        "roe_avg2y": 0.12994425121898454,
        "roe_period_end": 0.1254274358219811
      }
    },
    {
      "accn": "0001161728-20-000016",
      "filed": "2020-02-27",
      "fiscal_year": 2016,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "cash": "USD",
        "dividends_paid": "USD",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "operating_income": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD"
      },
      "fundamentals": {
        "capex": 83659000.0,
        "cash": 95959000.0,
        "dividends_paid": 41775000.0,
        "free_cash_flow": 64205000.0,
        "net_income": 75560000.0,
        "operating_cash_flow": 147864000.0,
        "operating_income": 123882000.0,
        "revenue": 544745000.0,
        "stockholders_equity": 724088000.0,
        "total_assets": 1801060000.0
      },
      "period_end": "2016-12-31",
      "ratio_units": {
        "net_margin": "ratio",
        "operating_margin": "ratio",
        "payout_ratio": "ratio",
        "roa_period_end": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "net_margin": 0.13870710148785212,
        "operating_margin": 0.22741282618472863,
        "payout_ratio": 0.5528718898888301,
        "roa_period_end": 0.04195307207977525,
        "roe_period_end": 0.10435195722066931
      }
    }
  ],
  "latest_filing": {
    "accn": "0001193125-26-067036",
    "filed": "2026-02-24",
    "form": "10-K"
  },
  "note": "Static grepcent export of verified SEC companyfacts-derived values. Monetary values are raw reported units from grepcent's resolved facts; no scaling and no FX conversion. Capex, dividends, and buybacks are reported as positive outflow magnitudes. ROE/ROA include both period-end basis (site-consistent) and average-of-two-years basis where the prior-year denominator exists.",
  "schema_version": "1",
  "sic": "4900",
  "sic_description": "Electric, Gas & Sanitary Services",
  "source_urls": {
    "sec_companyfacts": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001161728.json",
    "sec_submissions": "https://data.sec.gov/submissions/CIK0001161728.json"
  },
  "ticker": "MGEE"
}
