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Segment Information (Tables)
 6 Months Ended
Jun. 30, 2016
Segment Reporting [Abstract]  
Segment Information

The following tables show segment information for MGE Energy's operations for the indicated periods:

(In thousands)MGE EnergyElectricGasNon- Regulated EnergyTransmission InvestmentAll OthersConsolidation/ Elimination EntriesConsolidated Total
Three Months Ended June 30, 2016
Operating revenues$100,329$20,961$286$-$-$-$121,576
Interdepartmental revenues5676,14110,919--(17,627)-
Total operating revenues100,89627,10211,205--(17,627)121,576
Depreciation and amortization(7,259)(2,015)(1,828)-(12)-(11,114)
Other operating expenses(78,291)(21,295)(35)(3)(253)17,627(82,250)
Operating income (loss)15,3463,7929,342(3)(265)-28,212
Other income (deductions), net118(18)-1,767312-2,179
Interest (expense) income, net(2,776)(799)(1,449)-67-(4,957)
Income before taxes12,6882,9757,8931,764114-25,434
Income tax provision(4,158)(1,195)(3,168)(709)(54)-(9,284)
Net income$8,530$1,780$4,725$1,055$60$-$16,150
Three Months Ended June 30, 2015
Operating revenues$99,481$20,669$1,976$-$-$-$122,126
Interdepartmental revenues1222,2919,853--(12,266)-
Total operating revenues99,60322,96011,829--(12,266)122,126
Depreciation and amortization(7,456)(1,662)(1,866)-(11)-(10,995)
Other operating expenses(79,961)(19,089)(36)-(262)12,266(87,082)
Operating income (loss)12,1862,2099,927-(273)-24,049
Other income (deductions), net16(25)-2,290165-2,446
Interest (expense) income, net(2,768)(790)(1,507)-57-(5,008)
Income (loss) before taxes9,4341,3948,4202,290(51)-21,487
Income tax (provision) benefit(3,164)(557)(3,380)(919)12-(8,008)
Net income (loss)$6,270$837$5,040$1,371$(39)$-$13,479
Six Months Ended June 30, 2016
Operating revenues$193,537$74,798$768$-$-$-$269,103
Interdepartmental revenues1,02311,23821,896--(34,157)-
Total operating revenues194,56086,03622,664--(34,157)269,103
Depreciation and amortization(14,422)(3,996)(3,704)-(24)-(22,146)
Other operating expenses(153,670)(69,036)(82)(4)(579)34,157(189,214)
Operating income (loss)26,46813,00418,878(4)(603)-57,743
Other income (deductions), net314(26)-4,000333-4,621
Interest (expense) income, net(5,566)(1,607)(2,912)-128-(9,957)
Income (loss) before taxes21,21611,37115,9663,996(142)-52,407
Income tax (provision) benefit(6,694)(4,554)(6,408)(1,606)33-(19,229)
Net income (loss)$14,522$6,817$9,558$2,390$(109)$-$33,178
Six Months Ended June 30, 2015
Operating revenues$197,721$90,597$3,942$-$-$-$292,260
Interdepartmental revenues2375,01619,700--(24,953)-
Total operating revenues197,95895,61323,642--(24,953)292,260
Depreciation and amortization(14,788)(3,304)(3,729)-(23)-(21,844)
Other operating expenses(159,761)(79,157)(86)-(465)24,953(214,516)
Operating income (loss)23,40913,15219,827-(488)-55,900
Other income (deductions), net106(26)-4,171300-4,551
Interest (expense) income, net(5,587)(1,594)(3,025)-107-(10,099)
Income (loss) before taxes17,92811,53216,8024,171(81)-50,352
Income tax (provision) benefit(5,547)(4,638)(6,744)(1,675)9-(18,595)
Net income (loss)$12,381$6,894$10,058$2,496$(72)$-$31,757

The following tables show segment information for MGE's operations for the indicated periods:

(In thousands)MGEElectricGasNon- Regulated EnergyTransmission InvestmentConsolidation/ Elimination EntriesConsolidated Total
Three Months Ended June 30, 2016
Operating revenues$100,336$20,967$286$-$-$121,589
Interdepartmental revenues5606,13510,919-(17,614)-
Total operating revenues100,89627,10211,205-(17,614)121,589
Depreciation and amortization(7,259)(2,015)(1,828)--(11,102)
Other operating expenses*(82,405)(22,476)(3,203)(3)17,614(90,473)
Operating income (loss)*11,2322,6116,174(3)-20,014
Other income (deductions), net*74(32)-1,058-1,100
Interest expense, net(2,776)(799)(1,449)--(5,024)
Net income8,5301,7804,7251,055-16,090
Less: Net income attributable to
noncontrolling interest, net of tax----(5,952)(5,952)
Net income attributable to MGE$8,530$1,780$4,725$1,055$(5,952)$10,138
Three Months Ended June 30, 2015
Operating revenues$99,486$20,671$1,976$-$-$122,133
Interdepartmental revenues1172,2899,853-(12,259)-
Total operating revenues99,60322,96011,829-(12,259)122,133
Depreciation and amortization(7,456)(1,662)(1,866)--(10,984)
Other operating expenses*(83,079)(19,632)(3,416)-12,259(93,868)
Operating income*9,0681,6666,547--17,281
Other (deductions) income, net*(30)(39)-1,371-1,302
Interest expense, net(2,768)(790)(1,507)--(5,065)
Net income6,2708375,0401,371-13,518
Less: Net income attributable to
noncontrolling interest, net of tax----(6,626)(6,626)
Net income attributable to MGE$6,270$837$5,040$1,371$(6,626)$6,892
Six Months Ended June 30, 2016
Operating revenues$193,550$74,814$768$-$-$269,132
Interdepartmental revenues1,01011,22221,896-(34,128)-
Total operating revenues194,56086,03622,664-(34,128)269,132
Depreciation and amortization(14,422)(3,996)(3,704)--(22,122)
Other operating expenses*(160,284)(73,567)(6,490)(4)34,128(206,217)
Operating income (loss)*19,8548,47312,470(4)-40,793
Other income (deductions), net*234(49)-2,394-2,579
Interest expense, net(5,566)(1,607)(2,912)--(10,085)
Net income14,5226,8179,5582,390-33,287
Less: Net income attributable to
noncontrolling interest, net of tax----(12,204)(12,204)
Net income attributable to MGE$14,522$6,817$9,558$2,390$(12,204)$21,083
Six Months Ended June 30, 2015
Operating revenues$197,731$90,604$3,942$-$-$292,277
Interdepartmental revenues2275,00919,700-(24,936)-
Total operating revenues197,95895,61323,642-(24,936)292,277
Depreciation and amortization(14,788)(3,304)(3,729)--(21,821)
Other operating expenses*(165,221)(83,770)(6,830)-24,936(230,885)
Operating income*17,9498,53913,083--39,571
Other income (deductions), net*19(51)-2,496-2,464
Interest expense, net(5,587)(1,594)(3,025)--(10,206)
Net income12,3816,89410,0582,496-31,829
Less: Net income attributable to
noncontrolling interest, net of tax----(13,179)(13,179)
Net income attributable to MGE$12,381$6,894$10,058$2,496$(13,179)$18,650
*Amounts are shown net of the related tax expense, consistent with the presentation on the MGE Consolidated Statement of Income.