Madison Gas and Electric Company Consolidated Statements of Income (Unaudited) (MGE [Member], USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
MGE [Member]
Operating Revenues:
Regulated electric revenues	$ 114,963	$ 109,849	$ 291,804	$ 279,281
Regulated gas revenues	17,249	17,394	119,748	114,231
Nonregulated revenues	1,360	695	3,884	3,151
Total Operating Revenues	133,572	127,938	415,436	396,663
Operating Expenses:
Fuel for electric generation	16,656	12,622	39,304	31,765
Purchased power	18,024	18,603	49,997	56,537
Cost of gas sold	8,171	8,300	72,170	70,776
Other operations and maintenance	39,558	40,147	119,162	119,522
Depreciation and amortization	10,296	9,560	30,669	28,263
Other general taxes	4,347	4,098	13,053	12,947
Income tax provision	11,525	11,993	28,082	24,096
Total Operating Expenses	108,577	105,323	352,437	343,906
Operating Income	24,995	22,615	62,999	52,757
Other Income and Deductions:
AFUDC - equity funds	101	97	304	222
Equity in earnings in ATC	2,167	2,092	6,434	6,374
Income tax provision	(933)	(1,117)	(2,689)	(3,894)
Other income, net	(56)	461	(217)	2,716
Total Other Income and Deductions	1,279	1,533	3,832	5,418
Income before interest expense	26,274	24,148	66,831	58,175
Interest Expense:
Interest on long-term debt	5,214	4,755	15,428	14,028
Other interest, net	8	(670)	(244)	(1,815)
AFUDC - borrowed funds	(40)	(38)	(123)	(87)
Net Interest Expense	5,182	4,047	15,061	12,126
Net Income Including Noncontrolling Interest	21,092	20,101	51,770	46,049
Less Net Income Attributable to Noncontrolling Interest, net of tax	(6,010)	(5,108)	(17,935)	(15,104)
Net Income	$ 15,082	$ 14,993	$ 33,835	$ 30,945