Madison Gas and Electric Company Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other comprehensive income, net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	$ 0	$ 32	$ 0	$ 129
Comprehensive Income	18,351	15,575	38,352	34,972
MGE [Member]
Net Income	16,603	14,150	34,859	32,333
Other comprehensive income, net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	0	(25)	0	(31)
Total comprehensive income including noncontrolling interest	16,603	14,125	34,859	32,302
Less: Comprehensive income attributable to Noncontrolling Interest, net of tax	(5,505)	(5,396)	(11,311)	(10,785)
Comprehensive Income	$ 11,098	$ 8,729	$ 23,548	$ 21,517