Madison Gas and Electric Company Consolidated Statements of Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Revenues:
Regulated electric revenues	$ 375,858	$ 360,729	$ 332,324
Regulated gas revenues	165,271	165,915	192,334
Nonregulated revenues	5,253	5,947	9,161
Total Operating Revenues	546,382	532,591	533,819
Operating Expenses:
Fuel for electric generation	50,819	41,947	36,879
Purchased power	64,085	71,239	85,098
Cost of gas sold	99,465	103,784	123,062
Other operations and maintenance	165,859	164,001	145,177
Depreciation and amortization	40,942	37,960	41,080
Other general taxes	17,344	17,058	17,858
Total Operating Expenses	438,514	435,989	449,154
Operating Income	107,868	96,602	84,665
Other Income and Deductions:
Equity earnings in ATC	8,615	8,501	8,173
Total Other Income and Deductions	9,214	11,093	8,096
Interest Expense:
Net Interest Expense	20,162	16,157	13,594
Net Income	60,928	57,718	50,997
MGE [Member]
Operating Revenues:
Regulated electric revenues	375,858	360,729	332,324
Regulated gas revenues	165,271	165,915	192,334
Nonregulated revenues	5,253	5,947	9,161
Total Operating Revenues	546,382	532,591	533,819
Operating Expenses:
Fuel for electric generation	50,819	41,947	36,879
Purchased power	64,085	71,239	85,098
Cost of gas sold	99,465	103,784	123,062
Other operations and maintenance	164,903	163,168	144,429
Depreciation and amortization	40,942	37,960	41,080
Other general taxes	17,344	17,058	17,858
Income tax provision	32,287	29,556	23,973
Total Operating Expenses	469,845	464,712	472,379
Operating Income	76,537	67,879	61,440
Other Income and Deductions:
AFUDC - equity funds	413	301	473
Equity earnings in ATC	8,615	8,501	8,173
Income tax provision	(3,752)	(4,749)	(3,338)
Other income, net	(321)	2,715	(615)
Total Other Income and Deductions	4,955	6,768	4,693
Income before interest expense	81,492	74,647	66,133
Interest Expense:
Interest on long-term debt	20,634	18,800	16,417
Other interest, net	(226)	(2,500)	158
AFUDC - borrowed funds	(168)	(118)	(194)
Net Interest Expense	20,240	16,182	16,381
Net Income Including Noncontrolling Interest	61,252	58,465	49,752
Less Net Income Attributable to Noncontrolling Interest, net of tax	(23,970)	(20,740)	(13,883)
Net Income	$ 37,282	$ 37,725	$ 35,869