Madison Gas and Electric Company Consolidated Statements of Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Operating Revenues:
Electric revenues		$ 402,001	$ 414,274		$ 410,202
Gas revenues		157,767	148,825		134,543
Total Operating Revenues		559,768	563,099		544,745
Operating Expenses:
Fuel for electric generation		56,141	53,029		60,736
Purchased power		50,807	58,690		56,313
Cost of gas sold		84,968	76,644		66,771
Other operations and maintenance		177,823	177,740		172,335
Depreciation and amortization		56,412	53,077		44,646
Other general taxes		19,410	19,294		20,062
Total Operating Expenses		445,561	438,474		420,863
Operating Income (Loss)		114,207	124,625		123,882
Other Income and Deductions:
AFUDC - equity funds		2,500
Equity earnings in MGE Transco		8,821	10,125		8,428
Total Other Income and Deductions		17,055	14,399	[1]	14,057	[1]
Interest Expense:
Net Interest Expense		19,609	19,324		19,866
Net Income		84,219	97,606		75,560
MGE [Member]
Operating Revenues:
Electric revenues		402,001	414,277		410,226
Gas revenues		157,767	148,834		134,572
Total Operating Revenues		559,768	563,111		544,798
Operating Expenses:
Fuel for electric generation		56,141	53,031		60,745
Purchased power		50,807	58,692		56,327
Cost of gas sold		84,968	76,652		66,800
Other operations and maintenance		176,762	176,729		171,423
Depreciation and amortization		56,412	53,077		44,622
Other general taxes		19,410	19,294		20,062
Income tax provision		25,098	18,280		39,616
Total Operating Expenses		469,598	455,755		459,595
Operating Income (Loss)	[2]	90,170	107,356		85,203
Other Income and Deductions:
AFUDC - equity funds		3,284	1,222		1,207
Equity earnings in MGE Transco		0	0		6,366
Income tax provision		(363)	(710)		(2,175)
Other income (deductions), net		7,142	5,228		4,129
Total Other Income and Deductions	[2]	10,063	5,740	[1]	9,527	[1]
Income before interest expense		100,233	113,096		94,730
Interest Expense:
Interest on long-term debt		21,967	20,273		20,351
Other interest, net		338	163		182
AFUDC - borrowed funds		(1,108)	(412)		(395)
Net Interest Expense		21,197	20,024		20,138
Net Income Including Noncontrolling Interest		79,036	93,072		74,592
Less Net Income Attributable to Noncontrolling Interest, net of tax		(22,552)	(43,237)		(23,358)
Net Income		$ 56,484	$ 49,835		$ 51,234

[1] Reflects retrospective application of new accounting pronouncement related to pension and other postretirement benefits. See Footnote 2 for further information.

[2] Amounts are shown net of the related tax expense, consistent with the presentation on the MGE Consolidated Statements of Income.