Revenue (Details-1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Revenue (Details-1) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Total Operating Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	$ 159,452	$ 145,713	$ 378,422	$ 337,049
Electric [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	129,313	120,383	254,767	236,508
Electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	43,182	40,321	88,321	81,462
Electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	64,027	64,161	124,662	124,024
Electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	3,117	3,445	6,081	6,855
Electric [Member] \| Other-retail/municipal
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	10,342	10,403	19,690	20,093
Electric [Member] \| Total Retail [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	120,668	118,330	238,754	232,434
Electric [Member] \| Sales To The Market [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	7,840	1,519	14,320	2,595
Electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	805	534	1,693	1,479
Gas [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	29,925	25,116	123,406	100,285
Gas [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	17,956	15,589	71,824	58,987
Gas [Member] \| Commercial/Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	10,434	7,876	47,547	37,400
Gas [Member] \| Total Retail [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	28,390	23,465	119,371	96,387
Gas [Member] \| Gas Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	1,384	1,505	3,697	3,585
Gas [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	151	146	338	313
Non Regulated Energy [Member]
Disaggregation of Revenue [Line Items]
Revenues recognized from contracts with customers	$ 214	$ 214	$ 249	$ 256

MGE ENERGY INC 10-Q