Investments (Tables)

12 Months Ended

Dec. 31, 2012

Investments (Tables) [Abstract]

Equity Method, Available for Sale Securities, and Other Investments

(In thousands)		MGE Energy				MGE
		2012		2011		2012		2011
Available for sale securities:
Cost basis	$	1,575	$	1,347	$	490	$	482
Gross unrealized gains		161		196		10		87
Gross unrealized losses		(3)		(9)		(3)		(9)
Fair value	$	1,733	$	1,534	$	497	$	560
Equity method investments:
ATC	$	61,038	$	56,975	$	61,038	$	56,975
Other		20		21		20		21
Total equity method investments	$	61,058	$	56,996	$	61,058	$	56,996
Other investments		1,804		1,802		0		0
Total	$	64,595	$	60,332	$	61,555	$	57,556

		MGE Energy						MGE
(In thousands)		2012		2011		2010		2012		2011		2010
Cash proceeds	$	0	$	260	$	161	$	0	$	223	$	117
Gain on sale		0		198		43		0		171		39

ATC's Summarized Financial Data

(In thousands)
Income statement data for the year ended December 31,		2012		2011		2010
Operating revenues	$	603,254	$	567,174	$	556,741
Operating expenses		(280,999)		(261,568)		(251,120)
Other expense		(2,533)		(1,332)		(885)
Interest expense, net		(82,296)		(80,359)		(85,067)
Earnings before members' income taxes	$	237,426	$	223,915	$	219,669
Balance sheet data as of December 31,		2012		2011		2010
Current assets	$	63,134	$	58,671	$	59,856
Noncurrent assets		3,274,704		3,053,742		2,888,448
Total assets	$	3,337,838	$	3,112,413	$	2,948,304
Current liabilities	$	251,541	$	298,473	$	428,387
Long-term debt		1,550,000		1,400,005		1,175,010
Other noncurrent liabilities		95,829		82,647		84,940
Members' equity		1,440,468		1,331,288		1,259,967
Total members' equity and liabilities	$	3,337,838	$	3,112,413	$	2,948,304