Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Revenues:
Electric revenues	$ 110,127	$ 100,645
Gas revenue	98,811	67,270
Total Operating Revenues	208,938	167,915
Operating Expenses:
Fuel for electric generation	13,485	13,171
Purchased power	12,543	9,355
Cost of gas sold	64,802	37,444
Other operations and maintenance	49,994	45,682
Depreciation and amortization	21,046	18,382
Other general taxes	5,205	4,827
Total Operating Expenses	167,075	128,861
Operating Income	41,863	39,054
Other (expense) income, net	6,972	2,078
Interest expense, net	(6,571)	(5,740)
Income before income taxes	42,264	35,392
Income tax (provision) benefit	(7,844)	(459)
Net Income Including Noncontrolling Interest	34,420	34,933
Net Income	$ 34,420	$ 34,933
Earnings per share of Common Stock - Basic	$ 0.95	$ 0.97
Earnings per share of Common Stock - Diluted	0.95	0.97
Dividends per share of common stock	$ 0.388	$ 0.370
Weighted Average Number of Shares Outstanding, Basic	36,163	36,163
Weighted Average Shares Outstanding - Diluted	36,171	36,165
MGE [Member]
Operating Revenues:
Electric revenues	$ 110,127	$ 100,645
Gas revenue	98,811	67,270
Total Operating Revenues	208,938	167,915
Operating Expenses:
Fuel for electric generation	13,485	13,171
Purchased power	12,543	9,355
Cost of gas sold	64,802	37,444
Other operations and maintenance	49,746	45,538
Depreciation and amortization	21,046	18,382
Other general taxes	5,205	4,827
Total Operating Expenses	166,827	128,717
Operating Income	42,111	39,198
Other (expense) income, net	3,519	(104)
Interest expense, net	(6,577)	(5,753)
Income before income taxes	39,053	33,341
Income tax (provision) benefit	(7,000)	433
Net Income Including Noncontrolling Interest	32,053	33,774
Less Net Income Attributable to Noncontrolling Interest, net of tax	(4,756)	(5,501)
Net Income	$ 27,297	$ 28,273