Madison Gas and Electric Company Consolidated Statements of Cash Flows (Unaudited) (MGE [Member], USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
MGE [Member]
Operating Activities:
Net Income	$ 30,678	$ 25,948
Items not affecting cash:
Depreciation and amortization	20,373	18,703
Deferred income taxes	8,827	106
Provision for doubtful receivables	1,013	1,267
Employee benefit plan expenses	6,818	5,991
Equity earnings in ATC	(4,267)	(4,282)
Gain on sale of property	(74)	(2,604)
Other items	1,091	1,433
Changes in working capital items:
Decrease in current assets	28,916	22,568
Decrease in current liabilities	(9,687)	(2,637)
Dividend income from ATC	3,327	3,362
Cash contributions to pension and other postretirement plans	(19,932)	(10,506)
Other noncurrent items, net	(989)	3,285
Cash Provided by Operating Activities	66,094	62,634
Investing Activities:
Capital expenditures	(28,591)	(28,582)
Capital contributions to investments	(621)	(532)
Proceeds from sale of property	74	2,743
Other	332	(42)
Cash Used for Investing Activities	(28,806)	(26,413)
Financing Activities:
Cash dividends paid to parent by MGE	(13,192)	(12,957)
Distributions to parent from noncontrolling interest	(37,000)	(47,203)
Equity contribution received by noncontrolling interest	622	533
Affiliate financing of Elm Road	0	(4,193)
Repayment of long-term debt	(1,167)	(694)
Issuance of long-term debt	30,000	50,000
Decrease in short-term debt	(3,500)	(12,500)
Other	(297)	(850)
Cash Used for Financing Activities	(24,534)	(27,864)
Change in Cash and Cash Equivalents:	12,754	8,357
Cash and cash equivalents at beginning of period	4,494	2,474
Cash and cash equivalents at end of period	$ 17,248	$ 10,831