Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities:
Net Income	$ 34,420	$ 34,933
Items not affecting cash:
Depreciation and amortization	21,046	18,382
Deferred income taxes	5,606	(796)
Provision for doubtful receivables	441	388
Employee benefit plan cost (credit)	(1,678)	1,461
Equity earnings in investments	(2,504)	(2,444)
Other items	(486)	(277)
Changes in working capital items:
Decrease (increase) in current assets	12,332	(2,851)
Decrease in current liabilities	(7,115)	(4,213)
Dividends from investment	2,001	1,967
Cash contributions to pension and other postretirement plans	(1,660)	(1,552)
Other noncurrent items, net	(304)	(1,115)
Cash Provided by Operating Activities	62,099	43,883
Investing Activities:
Capital expenditures	(30,778)	(34,746)
Capital contributions to investments	(1,546)	(670)
Other	155	(419)
Cash Used for Investing Activities	(32,169)	(35,835)
Financing Activities:
Cash dividends paid on common stock	(14,013)	(13,380)
Repayments of long-term debt	(1,211)	(1,182)
(Repayments of) proceeds from short-term debt	(5,500)	1,500
Other	(492)	(523)
Cash Used for Financing Activities	(21,216)	(13,585)
Change in cash, cash equivalents, and restricted cash	8,714	(5,537)
Cash, cash equivalents, and restricted cash at beginning of period	18,835	47,039
Cash, cash equivalents, and restricted cash at end of period	27,549	41,502
Significant noncash investing activities:
Accrued capital expenditures	6,735	8,843
MGE [Member]
Operating Activities:
Net Income	32,053	33,774
Items not affecting cash:
Depreciation and amortization	21,046	18,382
Deferred income taxes	5,230	(1,766)
Provision for doubtful receivables	441	388
Employee benefit plan cost (credit)	(1,678)	1,461
Other items	587	(252)
Changes in working capital items:
Decrease (increase) in current assets	11,810	(3,037)
Decrease in current liabilities	(4,648)	(4,037)
Cash contributions to pension and other postretirement plans	(1,660)	(1,552)
Other noncurrent items, net	(500)	(1,380)
Cash Provided by Operating Activities	62,681	41,981
Investing Activities:
Capital expenditures	(30,778)	(34,746)
Other	(164)	(462)
Cash Used for Investing Activities	(30,942)	(35,208)
Financing Activities:
Cash dividends paid to parent by MGE	(5,000)	0
Distributions to parent from noncontrolling interest	(9,000)	(5,000)
Repayments of long-term debt	(1,211)	(1,182)
(Repayments of) proceeds from short-term debt	(5,500)	1,500
Other	(492)	(523)
Cash Used for Financing Activities	(21,203)	(5,205)
Change in cash, cash equivalents, and restricted cash	10,536	1,568
Cash, cash equivalents, and restricted cash at beginning of period	7,798	6,404
Cash, cash equivalents, and restricted cash at end of period	18,334	7,972
Significant noncash investing activities:
Accrued capital expenditures	$ 6,735	$ 8,843