Madison Gas and Electric Company Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other comprehensive income, net of tax:
Unrealized (loss) gain on available for sale securities, net of tax	$ (155)	$ (101)	$ 81
Comprehensive Income	75,405	71,242	80,400
MGE [Member]
Net Income	74,592	71,465	81,938
Other comprehensive income, net of tax:
Unrealized (loss) gain on available for sale securities, net of tax	(4)	(121)	(48)
Comprehensive Income Including Noncontrolling Interest	74,588	71,344	81,890
Less: Comprehensive Income Attributable to Noncontrolling Interest, net of tax	(23,358)	(26,097)	(26,310)
Comprehensive Income	$ 51,230	$ 45,247	$ 55,580