Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

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, 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
Year Ended December 31, 2019
Operating revenues	$	408,285		$	159,875		$	695		$	—		$	—		$	—		$	568,855
Interdepartmental revenues		806			16,070			40,020			—			—			(56,896	)		—
Total operating revenues		409,091			175,945			40,715			—			—			(56,896	)		568,855
Depreciation and amortization		(52,755	)		(11,320	)		(7,487	)		—			—			—			(71,562	)
Operating income (loss)		59,180			19,528			33,084			—			(882	)		—			110,910
Interest (expense) income, net		(14,978	)		(4,237	)		(5,083	)		—			1,235			—			(23,063	)
Income tax (provision) benefit		(5,037	)		(4,753	)		(7,628	)		(2,602	)		236			—			(19,784	)
Equity in earnings of investments		—			—			—			9,547			—			—			9,547
Net income (loss)		46,318			14,088			20,373			6,945			(850	)		—			86,874

(In thousands) MGE	Electric			Gas			Non-Regulated Energy			Consolidation/ Elimination Entries			Consolidated Total
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		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
Year Ended December 31, 2019
Operating revenues	$	408,285		$	159,875		$	695		$	—		$	568,855
Interdepartmental revenues		806			16,070			40,020			(56,896	)		—
Total operating revenues		409,091			175,945			40,715			(56,896	)		568,855
Depreciation and amortization		(52,755	)		(11,320	)		(7,487	)		—			(71,562	)
Operating income		59,180			19,528			33,084			—			111,792
Interest expense, net		(14,978	)		(4,237	)		(5,083	)		—			(24,298	)
Income tax provision		(5,037	)		(4,753	)		(7,628	)		—			(17,418	)
Net income attributable to MGE		46,318			14,088			20,373			(22,349	)		58,430

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, 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
December 31, 2019		1,308,277		408,001		258,004		71,668		443,278		(407,564	)		2,081,664
Capital Expenditures:
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
Year ended Dec. 31, 2019		125,086		36,193		2,757		—		—		—			164,036

	Utility				Consolidated
(In thousands) MGE	Electric		Gas		Non-regulated Energy		Consolidation/ Elimination Entries			Total
Assets:
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
December 31, 2019		1,308,277		408,001		257,954		(755	)		1,973,477
Capital Expenditures:
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
Year ended Dec. 31, 2019		125,086		36,193		2,757		—			164,036

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