Madison Gas and Electric Company Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other comprehensive income, net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	$ 0	$ 60	$ 0	$ 189
Comprehensive Income	29,506	26,689	67,858	61,661
MGE [Member]
Net Income	27,916	25,353	62,775	57,686
Other comprehensive income, net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	0	(7)	0	(38)
Total comprehensive income including noncontrolling interest	27,916	25,346	62,775	57,648
Less: Comprehensive income attributable to Noncontrolling Interest, net of tax	(5,629)	(5,439)	(16,940)	(16,224)
Comprehensive Income	$ 22,287	$ 19,907	$ 45,835	$ 41,424