Madison Gas and Electric Company Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	$ 36	[1]	$ (8)	[2]	$ 176	[3]	$ 35	[1]
Comprehensive Income	24,389		23,634		61,004		53,995
MGE [Member]
Net Income	24,331		23,676		60,856		54,180
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	49	[4]	(7)	[2]	77	[5]	(30)	[6]
Total comprehensive income including noncontrolling interest	24,380		23,669		60,933		54,150
Less: Comprehensive income attributable to Noncontrolling Interest, net of tax	(6,861)		(6,153)		(20,547)		(18,305)
Comprehensive Income	$ 17,519		$ 17,516		$ 40,386		$ 35,845

[1] Net of $24 tax

[2] Net of $5 tax

[3] Net of $117 tax

[4] Net of $33 tax

[5] Net of $52 tax

[6] Net of $20 tax