Madison Gas and Electric Company Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	$ 36	[1]	$ 9	[2]	$ 43	[3]	$ 81	[4]
Reclassification of realized gain on available-for-sale securities, net of tax	0	[5]	(15)	[6]	0	[5]	(15)	[6]
Comprehensive Income	14,306		12,717		30,361		30,572
MGE [Member]
Net Income	14,290		12,811		30,504		30,678
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale securities, net of tax	(7)	[7]	(3)	[8]	(23)	[9]	32	[10]
Reclassification of realized gain on available-for-sale securities, net of tax	0	[5]	(15)	[6]	0	[5]	(15)	[6]
Total comprehensive income including noncontrolling interest	14,283		12,793		30,481		30,695
Less: Comprehensive income attributable to Noncontrolling Interest, net of tax	(6,080)		(5,992)		(12,152)		(11,925)
Comprehensive Income	$ 8,203		$ 6,801		$ 18,329		$ 18,770

[1] Net of $24 tax

[2] Net of $6 tax

[3] Net of $29 tax

[4] Net of $54 tax

[5] Net of $0 tax

[6] Net of $10 tax

[7] Net of $5 tax

[8] Net of $2 tax

[9] Net of $15 tax

[10] Net of $21 tax