Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 10,615	$ 17,438
Accounts receivable, less reserves	44,460	46,205
Other accounts receivables, less reserves	13,863	16,094
Unbilled revenues	22,975	34,812
Materials and supplies, at average cost	32,208	29,863
Fuel for electric generation, at average cost	7,021	6,429
Stored natural gas, at average cost	36,167	15,668
Prepaid taxes	13,106	20,214
Regulatory assets - current	3,685	1,465
Other current assets	15,747	11,183
Total Current Assets	199,847	199,371
Other long-term receivables	574	1,155
Regulatory assets	110,807	107,547
Pension benefit asset	71,104	58,757
Other deferred assets and other	24,888	27,548
Property, Plant, and Equipment:
Property, plant, and equipment, net	1,848,053	1,828,171
Construction work in progress	106,451	50,603
Total Property, Plant, and Equipment	1,954,504	1,878,774
Investments	103,962	98,754
Total Assets	2,465,686	2,371,906
Current Liabilities:
Long-term debt due within one year	54,282	4,889
Short-term debt	40,000	5,500
Accounts payable	60,227	64,149
Accrued interest and taxes	7,819	10,385
Accrued payroll related items	10,464	12,951
Regulatory liabilities - current	14,611	9,365
Derivative liabilities	0	2,140
Other current liabilities	7,390	8,468
Total Current Liabilities	194,793	117,847
Other Credits:
Deferred income taxes	245,584	231,149
Investment tax credit - deferred	49,242	44,836
Regulatory liabilities	155,260	154,298
Accrued pension and other postretirement benefits	72,001	73,085
Finance lease liabilities	17,189	17,322
Other deferred liabilities and other	94,851	91,690
Total Other Credits	634,127	612,380
Capitalization:
Common shareholders equity	1,075,200	1,027,468
Long-term debt	561,566	614,211
Total Capitalization	1,636,766	1,641,679
Commitments and contingencies (see Footnote 8)
Total Liabilities and Capitalization	2,465,686	2,371,906
MGE [Member]
Current Assets:
Cash and cash equivalents	4,475	6,401
Accounts receivable, less reserves	44,460	46,205
Affiliate receivables	542	558
Other accounts receivables, less reserves	13,862	16,092
Unbilled revenues	22,975	34,812
Materials and supplies, at average cost	32,208	29,863
Fuel for electric generation, at average cost	7,021	6,429
Stored natural gas, at average cost	36,167	15,668
Prepaid taxes	13,488	19,379
Regulatory assets - current	3,685	1,465
Other current assets	15,679	11,071
Total Current Assets	194,562	187,943
Affiliate receivable long-term	1,191	1,589
Regulatory assets	110,807	107,547
Pension benefit asset	71,104	58,757
Other deferred assets and other	24,995	27,907
Property, Plant, and Equipment:
Property, plant, and equipment, net	1,848,081	1,828,199
Construction work in progress	106,451	50,603
Total Property, Plant, and Equipment	1,954,532	1,878,802
Investments	99	230
Total Assets	2,357,290	2,262,775
Current Liabilities:
Long-term debt due within one year	54,282	4,889
Short-term debt	40,000	5,500
Accounts payable	60,206	64,130
Accrued interest and taxes	7,774	10,649
Accrued payroll related items	10,464	12,951
Regulatory liabilities - current	14,611	9,365
Derivative liabilities	0	2,140
Other current liabilities	7,389	5,968
Total Current Liabilities	194,726	115,592
Other Credits:
Deferred income taxes	213,005	198,885
Investment tax credit - deferred	49,242	44,836
Regulatory liabilities	155,260	154,298
Accrued pension and other postretirement benefits	72,001	73,085
Finance lease liabilities	17,189	17,322
Other deferred liabilities and other	95,926	92,152
Total Other Credits	602,623	580,578
Capitalization:
Common shareholders equity	851,341	803,807
Noncontrolling interest	147,034	148,587
Total Equity	998,375	952,394
Long-term debt	561,566	614,211
Total Capitalization	1,559,941	1,566,605
Commitments and contingencies (see Footnote 8)
Total Liabilities and Capitalization	$ 2,357,290	$ 2,262,775