Segment Information (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Segment Information

The following table shows segment information for MGE Energy's and MGE's operations:

(In thousands) MGE Energy	Electric			Gas			Non-Regulated Energy			Transmission Investment			All Others			Consolidation/ Elimination Entries			Consolidated Total
Year Ended December 31, 2022
Operating revenues	$	465,167		$	248,672		$	680		$	—		$	—		$	—		$	714,519
Interdepartmental revenues		(44	)		34,073			41,555			—			—			(75,584	)		—
Total operating revenues		465,123			282,745			42,235			—			—			(75,584	)		714,519
Depreciation and amortization		(62,897	)		(15,261	)		(7,391	)		—			—			—			(85,549	)
Operating income (loss)		77,672			26,261			34,683			—			(873	)		—			137,743
Interest (expense) income, net		(17,578	)		(4,787	)		(4,322	)		—			40			—			(26,647	)
Income tax (provision) benefit		(7,299	)		(8,492	)		(8,272	)		(2,490	)		329			—			(26,224	)
Equity in earnings of investments		—			—			—			9,136			—			—			9,136
Net income (loss)		65,187			18,215			22,090			6,647			(1,187	)		—			110,952
Year Ended December 31, 2021
Operating revenues	$	420,286		$	185,620		$	678		$	—		$	—		$	—		$	606,584
Interdepartmental revenues		556			22,728			40,866			—			—			(64,150	)		—
Total operating revenues		420,842			208,348			41,544			—			—			(64,150	)		606,584
Depreciation and amortization		(56,672	)		(12,852	)		(7,459	)		—			—			—			(76,983	)
Operating income (loss)		58,993			25,133			33,936			—			(768	)		—			117,294
Interest (expense) income, net		(15,261	)		(4,315	)		(4,577	)		—			41			—			(24,112	)
Income tax (provision) benefit		10,672			(4,922	)		(7,998	)		(2,486	)		619			—			(4,115	)
Equity in earnings of investments		—			—			—			9,339			(69	)		—			9,270
Net income (loss)		63,910			15,511			21,361			6,852			(1,873	)		—			105,761
Year Ended December 31, 2020
Operating revenues	$	393,692		$	144,261		$	680		$	—		$	—		$	—		$	538,633
Interdepartmental revenues		765			12,157			40,402			—			—			(53,324	)		—
Total operating revenues		394,457			156,418			41,082			—			—			(53,324	)		538,633
Depreciation and amortization		(54,658	)		(12,049	)		(7,481	)		—			—			—			(74,188	)
Operating income (loss)		57,847			19,674			33,460			(1	)		(983	)		—			109,997
Interest (expense) income, net		(14,446	)		(4,370	)		(4,826	)		—			121			—			(23,521	)
Income tax (provision) benefit		(4,230	)		(4,805	)		(7,800	)		(2,786	)		198			—			(19,423	)
Equity in earnings of investments		—			—			—			10,221			—			—			10,221
Net income (loss)		50,522			14,167			20,834			7,434			(539	)		—			92,418

(In thousands) MGE	Electric			Gas			Non-Regulated Energy			Consolidation/ Elimination Entries			Consolidated Total
Year Ended December 31, 2022
Operating revenues	$	465,167		$	248,672		$	680		$	—		$	714,519
Interdepartmental revenues		(44	)		34,073			41,555			(75,584	)		—
Total operating revenues		465,123			282,745			42,235			(75,584	)		714,519
Depreciation and amortization		(62,897	)		(15,261	)		(7,391	)		—			(85,549	)
Operating income		77,672			26,261			34,683			—			138,616
Interest expense, net		(17,578	)		(4,787	)		(4,322	)		—			(26,687	)
Income tax provision		(7,299	)		(8,492	)		(8,272	)		—			(24,063	)
Net income attributable to MGE		65,187			18,215			22,090			(21,576	)		83,916
Year Ended December 31, 2021
Operating revenues	$	420,286		$	185,620		$	678		$	—		$	606,584
Interdepartmental revenues		556			22,728			40,866			(64,150	)		—
Total operating revenues		420,842			208,348			41,544			(64,150	)		606,584
Depreciation and amortization		(56,672	)		(12,852	)		(7,459	)		—			(76,983	)
Operating income		58,993			25,133			33,936			—			118,062
Interest expense, net		(15,261	)		(4,315	)		(4,577	)		—			(24,153	)
Income tax (provision) benefit		10,672			(4,922	)		(7,998	)		—			(2,248	)
Net income attributable to MGE		63,910			15,511			21,361			(22,391	)		78,391
Year Ended December 31, 2020
Operating revenues	$	393,692		$	144,261		$	680		$	—		$	538,633
Interdepartmental revenues		765			12,157			40,402			(53,324	)		—
Total operating revenues		394,457			156,418			41,082			(53,324	)		538,633
Depreciation and amortization		(54,658	)		(12,049	)		(7,481	)		—			(74,188	)
Operating income		57,847			19,674			33,460			—			110,981
Interest expense, net		(14,446	)		(4,370	)		(4,826	)		—			(23,642	)
Income tax provision		(4,230	)		(4,805	)		(7,800	)		—			(16,835	)
Net income attributable to MGE		50,522			14,167			20,834			(22,393	)		63,130

The following table shows segment information for MGE Energy's and MGE's assets and capital expenditures:

	Utility				Consolidated
(In thousands) MGE Energy	Electric		Gas		Non-regulated Energy		Transmission Investment(a)		All Others		Consolidation/ Elimination Entries			Total
Assets:
December 31, 2022	$	1,626,373	$	530,733	$	247,841	$	80,642	$	467,112	$	(435,101	)	$	2,517,600
December 31, 2021		1,525,163		485,345		252,584		75,990		467,954		(435,130	)		2,371,906
December 31, 2020		1,421,302		444,702		254,298		74,480		495,483		(436,614	)		2,253,651
Capital Expenditures:
Year ended Dec. 31, 2022	$	141,273	$	27,656	$	6,101	$	—	$	—	$	—		$	175,030
Year ended Dec. 31, 2021		115,234		34,071		3,864		—		—		—			153,169
Year ended Dec. 31, 2020		162,210		36,906		4,023		—		—		—			203,139

	Utility				Consolidated
(In thousands) MGE	Electric		Gas		Non-regulated Energy		Consolidation/ Elimination Entries			Total
Assets:
December 31, 2022	$	1,626,373	$	530,733	$	247,791	$	(258	)	$	2,404,639
December 31, 2021		1,525,163		485,345		252,534		(267	)		2,262,775
December 31, 2020		1,421,302		444,702		254,248		(281	)		2,119,971
Capital Expenditures:
Year ended Dec. 31, 2022	$	141,273	$	27,656	$	6,101	$	—		$	175,030
Year ended Dec. 31, 2021		115,234		34,071		3,864		—			153,169
Year ended Dec. 31, 2020		162,210		36,906		4,023		—			203,139

(a)The Transmission Investment segment represents MGE Energy's investment in equity method investees.