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Segment Information (Tables)
 12 Months Ended
Dec. 31, 2014
Segment Reporting [Abstract]  
Segment Information

The following table shows segment information for MGE Energy's and MGE's operations:

(In thousands)MGE EnergyElectricGasNon-Regulated EnergyTransmission InvestmentAll OthersConsolidation/ Elimination EntriesConsolidated Total
Year Ended December 31, 2014
Operating revenues$394,849 $221,720 $3,283 $-$-$-$619,852
Interdepartmental revenues509 8,366 42,692 --(51,567)-
Total operating revenues395,358 230,086 45,975 --(51,567)619,852
Depreciation and amortization(26,933)(6,308)(7,407)-(47)-(40,695)
Other operating expenses(297,409)(194,203)(139)-(875)51,567 (441,059)
Operating income (loss)71,016 29,575 38,429 -(922)-138,098
Other (deductions) income, net2,847 (86)-9,150 (1,832)-10,079
Interest (expense) income, net(10,410)(3,229)(6,208)-174 -(19,673)
Income (loss) before taxes63,453 26,260 32,221 9,150 (2,580)-128,504
Income tax (provision) benefit(22,070)(10,480)(12,932)(3,664)961 -(48,185)
Net income (loss)$41,383 $15,780 $19,289 $5,486 $(1,619)$-$80,319
Year Ended December 31, 2013
Operating revenues$403,957 $181,462 $5,468 $-$-$-$590,887
Interdepartmental revenues537 12,629 42,591 --(55,757)-
Total operating revenues404,494 194,091 48,059 --(55,757)590,887
Depreciation and amortization(25,780)(5,898)(7,156)-(4)-(38,838)
Other operating expenses(316,277)(162,661)(128)(1)(752)55,757 (424,062)
Operating income (loss)62,437 25,532 40,775 (1)(756)-127,987
Other (deductions) income, net3,062 59 -9,434 (1,854)-10,701
Interest (expense) income, net(9,645)(2,986)(6,400)-107 -(18,924)
Income (loss) before taxes55,854 22,605 34,375 9,433 (2,503)-119,764
Income tax (provision) benefit(19,176)(9,168)(13,682)(3,796)963 -(44,859)
Net income (loss)$36,678 $13,437 $20,693 $5,637 $(1,540)$-$74,905
Year Ended December 31, 2012
Operating revenues$392,365 $139,727 $9,231 $-$-$-$541,323
Interdepartmental revenues487 12,814 34,714 --(48,015)-
Total operating revenues392,852 152,541 43,945 --(48,015)541,323
Depreciation and amortization(26,031)(5,569)(7,107)---(38,707)
Other operating expenses(300,149)(136,567)(121)-(1,031)48,015 (389,853)
Operating income (loss)66,672 10,405 36,717 -(1,031)-112,763
Other (deductions) income, net1,145 323 -9,080 (479)-10,069
Interest (expense) income, net(10,189)(2,874)(6,537)-133 -(19,467)
Income (loss) before taxes57,628 7,854 30,180 9,080 (1,377)-103,365
Income tax (provision) benefit(20,906)(2,769)(12,113)(3,648)517 -(38,919)
Net income (loss)$36,722 $5,085 $18,067 $5,432 $(860)$-$64,446

(In thousands)MGEElectricGasNon-Regulated EnergyTransmission InvestmentConsolidation/ Elimination EntriesConsolidated Total
Year Ended December 31, 2014
Operating revenues$394,871 $221,741 $3,283 $-$-$619,895
Interdepartmental revenues487 8,345 42,692 -(51,524)-
Total operating revenues395,358 230,086 45,975 -(51,524)619,895
Depreciation and amortization(26,933)(6,308)(7,407)--(40,648)
Other operating expenses*(319,175)(204,597)(13,071)-51,524 (485,319)
Operating income*49,250 19,181 25,497 --93,928
Other (deductions) income, net*2,543 (172)-5,486 -7,857
Interest expense, net(10,410)(3,229)(6,208)--(19,847)
Net income41,383 15,780 19,289 5,486 -81,938
Less: Net income attributable to
noncontrolling interest, net of tax----(26,310)(26,310)
Net income attributable to MGE$41,383 $15,780 $19,289 $5,486 $(26,310)$55,628
Year Ended December 31, 2013
Operating revenues$403,980 $181,477 $5,468 $-$-$590,925
Interdepartmental revenues514 12,614 42,591 -(55,719)-
Total operating revenues404,494 194,091 48,059 -(55,719)590,925
Depreciation and amortization(25,780)(5,898)(7,156)--(38,834)
Other operating expenses*(335,059)(171,717)(13,810)(1)55,719 (464,868)
Operating income (loss)*43,655 16,476 27,093 (1)-87,223
Other (deductions) income, net*2,668 (53)-5,638 -8,253
Interest expense, net(9,645)(2,986)(6,400)--(19,031)
Net income36,678 13,437 20,693 5,637 -76,445
Less: net income attributable to
noncontrolling interest, net of tax----(27,438)(27,438)
Net income attributable to MGE$36,678 $13,437 $20,693 $5,637 $(27,438)$49,007
Year Ended December 31, 2012
Operating revenues$392,365 $139,727 $9,231 $-$-$541,323
Interdepartmental revenues487 12,814 34,714 -(48,015)-
Total operating revenues392,852 152,541 43,945 -(48,015)541,323
Depreciation and amortization(26,031)(5,569)(7,107)--(38,707)
Other operating expenses*(320,701)(139,236)(12,234)-48,015 (424,156)
Operating income*46,120 7,736 24,604 --78,460
Other income, net*791 223 -5,432 -6,446
Interest expense, net(10,189)(2,874)(6,537)--(19,600)
Net income36,722 5,085 18,067 5,432 -65,306
Less: Net income attributable to
noncontrolling interest, net of tax----(24,489)(24,489)
Net income attributable to MGE$36,722 $5,085 $18,067 $5,432 $(24,489)$40,817
*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:
UtilityConsolidated
(In thousands) MGE EnergyElectricGasAssetsnot AllocatedNonregulated EnergyTransmission InvestmentAll OthersConsolidation/ Elimination EntriesTotal
Assets:
December 31, 2014$948,241 $308,499 $41,346 $281,410 $67,697 $441,109 $(390,636)$1,697,666
December 31, 2013899,257 265,694 19,853 288,116 64,504 431,436 (389,800)1,579,060
December 31, 2012888,444 285,468 18,559 323,216 61,064 413,291 (403,118)1,586,924
Capital Expenditures:
Year ended Dec. 31, 2014$68,067 $22,104 $-$2,505 $-$-$-$92,676
Year ended Dec. 31, 2013100,146 15,554 -3,347 ---119,047
Year ended Dec. 31, 201281,965 13,812 -2,658 ---98,435

UtilityConsolidated
(In thousands)MGEElectricGasAssetsnot AllocatedNonregulated EnergyTransmission InvestmentConsolidation/ Elimination EntriesTotal
Assets:
December 31, 2014$948,241 $308,499 $41,346 $281,360 $67,697 $(6,521)$1,640,622
December 31, 2013899,257 265,694 19,853 288,066 64,504 (6,731)1,530,643
December 31, 2012888,444 285,468 18,559 323,166 61,064 (23,050)1,553,651
Capital Expenditures:
Year ended Dec. 31, 2014$68,067 $22,104 $-$2,505 $-$-$92,676
Year ended Dec. 31, 2013100,146 15,554 -3,347 --119,047
Year ended Dec. 31, 201281,965 13,812 -2,658 --98,435