Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Information (Tables) [Abstract]

(In thousands)						Non-						Consolidation/
MGE Energy						Regulated		Transmission		All		Elimination		Consolidated
		Electric		Gas		Energy		Investment		Others		Entries		Total
Year Ended December 31, 2011
Operating revenues	$	375,858	$	165,271	$	5,253	$	0	$	0	$	0	$	546,382
Interdepartmental revenues		495		12,440		38,148		0		0		(51,083)		0
Total operating revenues		376,353		177,711		43,401		0		0		(51,083)		546,382
Depreciation and amortization		(28,323)		(5,593)		(7,026)		0		0		0		(40,942)
Other operating expenses		(292,080)		(155,444)		(174)		0		(957)		51,083		(397,572)
Operating income (loss)		55,950		16,674		36,201		0		(957)		0		107,868
Other income, net		71		20		0		8,614		509		0		9,214
Interest (expense) income, net		(10,849)		(3,060)		(6,331)		0		78		0		(20,162)
Income (loss) before taxes		45,172		13,634		29,870		8,614		(370)		0		96,920
Income tax (provision) benefit		(15,334)		(5,249)		(11,988)		(3,467)		46		0		(35,992)
Net income (loss)	$	29,838	$	8,385	$	17,882	$	5,147	$	(324)	$	0	$	60,928

Year Ended December 31, 2010
Operating revenues	$	360,729	$	165,915	$	5,947	$	0	$	0	$	0	$	532,591
Interdepartmental revenues		504		11,509		28,462		0		0		(40,475)		0
Total operating revenues		361,233		177,424		34,409		0		0		(40,475)		532,591
Depreciation and amortization		(27,498)		(5,237)		(5,225)		0		0		0		(37,960)
Other operating expenses		(279,389)		(158,146)		(136)		0		(833)		40,475		(398,029)
Operating income (loss)		54,346		14,041		29,048		0		(833)		0		96,602
Other (deductions) income, net		2,353		664		0		8,501		(425)		0		11,093
Interest (expense) income, net		(10,548)		(2,975)		(2,659)		0		25		0		(16,157)
Income (loss) before taxes		46,151		11,730		26,389		8,501		(1,233)		0		91,538
Income tax (provision) benefit		(15,983)		(4,299)		(10,581)		(3,443)		486		0		(33,820)
Net income (loss)	$	30,168	$	7,431	$	15,808	$	5,058	$	(747)	$	0	$	57,718

Year Ended December 31, 2009
Operating revenues	$	332,324	$	192,334	$	9,161	$	0	$	0	$	0	$	533,819
Interdepartmental revenues		524		7,681		14,899		0		0		(23,104)		0
Total operating revenues		332,848		200,015		24,060		0		0		(23,104)		533,819
Depreciation and amortization		(28,779)		(9,557)		(2,744)		0		0		0		(41,080)
Other operating expenses		(258,988)		(171,313)		(129)		(1)		(747)		23,104		(408,074)
Operating income (loss)		45,081		19,145		21,187		(1)		(747)		0		84,665
Other (deductions) income, net		(110)		(31)		0		8,172		65		0		8,096
Interest (expense) income, net		(10,678)		(3,012)		(2,690)		(1)		2,787		0		(13,594)
Income before taxes		34,293		16,102		18,497		8,170		2,105		0		79,167
Income tax provision		(10,373)		(6,234)		(7,424)		(3,280)		(859)		0		(28,170)
Net income	$	23,920	$	9,868	$	11,073	$	4,890	$	1,246	$	0	$	50,997

(In thousands)						Non-				Consolidation/
MGE						Regulated		Transmission		Elimination		Consolidated
		Electric		Gas		Energy		Investment		Entries		Total
Year Ended December 31, 2011
Operating revenues	$	375,858	$	165,271	$	5,253	$	0	$	0	$	546,382
Interdepartmental revenues		495		12,440		38,148		0		(51,083)		0
Total operating revenues		376,353		177,711		43,401		0		(51,083)		546,382
Depreciation and amortization		(28,323)		(5,593)		(7,026)		0		0		(40,942)
Other operating expenses*		(307,193)		(160,631)		(12,162)		0		51,083		(428,903)
Operating income*		40,837		11,487		24,213		0		0		76,537
Other (deductions) income, net*		(150)		(42)		0		5,147		0		4,955
Interest expense, net		(10,849)		(3,060)		(6,331)		0		0		(20,240)
Net income		29,838		8,385		17,882		5,147		0		61,252
Less: Net income attributable to
noncontrolling interest, net of tax		0		0		0		0		(23,970)		(23,970)
Net income attributable to MGE	$	29,838	$	8,385	$	17,882	$	5,147	$	(23,970)	$	37,282

Year Ended December 31, 2010
Operating revenues	$	360,729	$	165,915	$	5,947	$	0	$	0	$	532,591
Interdepartmental revenues		504		11,509		28,462		0		(40,475)		0
Total operating revenues		361,233		177,424		34,409		0		(40,475)		532,591
Depreciation and amortization		(27,498)		(5,237)		(5,225)		0		0		(37,960)
Other operating expenses*		(294,353)		(162,157)		(10,717)		0		40,475		(426,752)
Operating income*		39,382		10,030		18,467		0		0		67,879
Other income, net*		1,334		376		0		5,058		0		6,768
Interest expense, net		(10,548)		(2,975)		(2,659)		0		0		(16,182)
Net income		30,168		7,431		15,808		5,058		0		58,465
Less: net income attributable to
noncontrolling interest, net of tax		0		0		0		0		(20,740)		(20,740)
Net income attributable to MGE	$	30,168	$	7,431	$	15,808	$	5,058	$	(20,740)	$	37,725

Year Ended December 31, 2009
Operating revenues	$	332,324	$	192,334	$	9,161	$	0	$	0	$	533,819
Interdepartmental revenues		524		7,681		14,899		0		(23,104)		0
Total operating revenues		332,848		200,015		24,060		0		(23,104)		533,819
Depreciation and amortization		(28,779)		(9,557)		(2,744)		0		0		(41,080)
Other operating expenses*		(269,316)		(177,534)		(7,552)		(1)		23,104		(431,299)
Operating income (loss)*		34,753		12,924		13,764		(1)		0		61,440
Other (deductions) income, net*		(155)		(44)		0		4,892		0		4,693
Interest expense, net		(10,678)		(3,012)		(2,690)		(1)		0		(16,381)
Net income		23,920		9,868		11,074		4,890		0		49,752
Less: Net income attributable to
noncontrolling interest, net of tax		0		0		0		0		(13,883)		(13,883)
Net income attributable to MGE	$	23,920	$	9,868	$	11,074	$	4,890	$	(13,883)	$	35,869

*Amounts are shown net of the related tax expense, consistent with the presentation on the consolidated MGE Income Statement.

The following table shows segment information for MGE Energy's and MGE's assets and capital expenditures:

		Utility						Consolidated
(In thousands)						Assets							Consolidation/
MGE Energy						not	Nonregulated			Transmission		All		Elimination
		Electric		Gas		Allocated		Energy		Investment		Others		Entries		Total
Assets:
December 31, 2011	$	794,738	$	285,702	$	32,882	$	299,421	$	57,006	$	401,862	$	(412,729)	$	1,458,882
December 31, 2010		721,721		257,505		22,079		300,862		54,241		376,219		(414,734)		1,317,893
December 31, 2009		695,897		249,610		22,342		292,101		51,728		389,744		(419,537)		1,281,885
Capital Expenditures:
Year ended Dec. 31, 2011	$	47,206	$	15,830	$	0	$	2,140	$	0	$	0	$	0	$	65,176
Year ended Dec. 31, 2010		33,655		13,719		0		12,708		0		0		0		60,082
Year ended Dec. 31, 2009		37,014		13,734		0		27,181		0		0		0		77,929


		Utility						Consolidated
(In thousands)						Assets					Consolidation/
MGE						not	Nonregulated			Transmission		Elimination
		Electric		Gas		Allocated		Energy		Investment		Entries		Total
Assets:
December 31, 2011	$	794,738	$	285,702	$	32,882	$	299,171	$	57,006	$	(35,706)	$	1,433,793
December 31, 2010		721,721		257,505		22,079		300,612		54,241		(37,217)		1,318,941
December 31, 2009		695,897		249,610		22,342		291,856		51,728		(37,878)		1,273,555
Capital Expenditures:
Year ended Dec. 31, 2011	$	47,206	$	15,830	$	0	$	2,140	$	0	$	0	$	65,176
Year ended Dec. 31, 2010		33,655		13,719		0		12,708		0		0		60,082
Year ended Dec. 31, 2009		37,014		13,734		0		27,181		0		0		77,929

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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