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Segment Information
 12 Months Ended
Dec. 31, 2013
Segment Reporting [Abstract]  
Segment Information

Segment Information - MGE Energy and MGE.

 

The electric utility business purchases, generates and distributes electricity, and contracts for transmission service. The gas utility business purchases and distributes natural gas and contracts for the transportation of natural gas. Both the electric and gas segments operate through MGE Energy's principal subsidiary, MGE.

 

The nonregulated energy operations are conducted through MGE Energy's subsidiaries: MGE Power, MGE Power Elm Road, and MGE Power West Campus. These subsidiaries own and lease electric generating capacity to assist MGE. MGE Power Elm Road has an ownership interest in two coal-fired generating units in Oak Creek, Wisconsin, which are leased to MGE, and MGE Power West Campus owns a controlling interest in the electric generation plant of a natural gas-fired cogeneration facility on the UW campus. MGE Power West Campus's portion is also leased to MGE.

 

The transmission investment segment invests, through MGE Transco, in ATC, a company that provides electric transmission services primarily in Wisconsin. See Footnote 4 for further discussion of MGE Transco and the investment in ATC.

 

The "All Others" segment includes: corporate, CWDC, MAGAEL, MGE Construct, NGV Fueling Services, and North Mendota. These entities' operations consist of investing in companies and property which relate to the regulated operations, financing the regulated operations, or owning and operating natural gas compression equipment.

 

General corporate expenses include the cost of executive management, corporate accounting and finance, information technology, risk management, human resources and legal functions, and employee benefits that are allocated to electric and gas segments based on formulas prescribed by the PSCW. Identifiable assets are those used in MGE's operations in each segment. Assets not allocated consist primarily of cash and cash equivalents, restricted cash, investments, other accounts receivable, and prepaid assets.

 

Sales between our electric and gas segments are based on PSCW approved tariffed rates. Additionally, intersegment operations related to the leasing arrangement between our electric segment and MGE Power Elm Road/MGE Power West Campus are based on terms previously approved by the PSCW. Consistent with internal reporting, management has presented the direct financing capital leases between MGE and MGE Power Elm Road/MGE Power West Campus based on actual lease payments included in rates. Lease payments made by MGE to MGE Power Elm Road and MGE Power West Campus are shown as operating expenses. The lease payments received by MGE Power Elm Road and MGE Power West Campus from MGE are shown as lease income in interdepartmental revenues. The depreciation expense associated with the Elm Road Units and WCCF is reflected in the nonregulated energy segment.

 

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

(In thousands)     Non-     Consolidation/  
MGE Energy     Regulated Transmission All Elimination Consolidated
  Electric Gas Energy Investment Others Entries Total
Year Ended December 31, 2013            
Operating revenues$403,957$181,462$5,468$0$0$0$590,887
Interdepartmental revenues 537 12,629 42,591 0 0 (55,757) 0
Total operating revenues 404,494 194,091 48,059 0 0 (55,757) 590,887
Depreciation and amortization (25,780) (5,898) (7,156) 0 (4) 0 (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) 0 127,987
Other (deductions) income, net 3,062 59 0 9,434 (1,854) 0 10,701
Interest (expense) income, net (9,645) (2,986) (6,400) 0 107 0 (18,924)
Income (loss) before taxes 55,854 22,605 34,375 9,433 (2,503) 0 119,764
Income tax (provision) benefit (19,176) (9,168) (13,682) (3,796) 963 0 (44,859)
Net income (loss)$36,678$13,437$20,693$5,637$(1,540)$0$74,905
               
Year Ended December 31, 2012            
Operating revenues$392,365$139,727$9,231$0$0$0$541,323
Interdepartmental revenues 487 12,814 34,714 0 0 (48,015) 0
Total operating revenues 392,852 152,541 43,945 0 0 (48,015) 541,323
Depreciation and amortization (26,031) (5,569) (7,107) 0 0 0 (38,707)
Other operating expenses (300,149) (136,567) (121) 0 (1,031) 48,015 (389,853)
Operating income (loss) 66,672 10,405 36,717 0 (1,031) 0 112,763
Other (deductions) income, net 1,145 323 0 9,080 (479) 0 10,069
Interest (expense) income, net (10,189) (2,874) (6,537) 0 133 0 (19,467)
Income (loss) before taxes 57,628 7,854 30,180 9,080 (1,377) 0 103,365
Income tax (provision) benefit (20,906) (2,769) (12,113) (3,648) 517 0 (38,919)
Net income (loss)$36,722$5,085$18,067$5,432$(860)$0$64,446
               
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

(In thousands)     Non-   Consolidation/  
MGE     Regulated Transmission Elimination Consolidated
  Electric Gas Energy Investment Entries Total
Year Ended December 31, 2013            
Operating revenues$403,980$181,477$5,468$0$0$590,925
Interdepartmental revenues 514 12,614 42,591 0 (55,719) 0
Total operating revenues 404,494 194,091 48,059 0 (55,719) 590,925
Depreciation and amortization (25,780) (5,898) (7,156) 0 0 (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) 0 87,223
Other (deductions) income, net* 2,668 (53) 0 5,638 0 8,253
Interest expense, net (9,645) (2,986) (6,400) 0 0 (19,031)
Net income 36,678 13,437 20,693 5,637 0 76,445
Less: Net income attributable to            
noncontrolling interest, net of tax 0 0 0 0 (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$0$0$541,323
Interdepartmental revenues 487 12,814 34,714 0 (48,015) 0
Total operating revenues 392,852 152,541 43,945 0 (48,015) 541,323
Depreciation and amortization (26,031) (5,569) (7,107) 0 0 (38,707)
Other operating expenses* (320,701) (139,236) (12,234) 0 48,015 (424,156)
Operating income* 46,120 7,736 24,604 0 0 78,460
Other income, net* 791 223 0 5,432 0 6,446
Interest expense, net (10,189) (2,874) (6,537) 0 0 (19,600)
Net income 36,722 5,085 18,067 5,432 0 65,306
Less: net income attributable to            
noncontrolling interest, net of tax 0 0 0 0 (24,489) (24,489)
Net income attributable to MGE$36,722$5,085$18,067$5,432$(24,489)$40,817
             
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
             
*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 NonregulatedTransmission All Elimination  
  Electric Gas Allocated  Energy Investment Others Entries Total
Assets:                 
December 31, 2013$899,257$265,694$19,853 $288,116$64,504$431,436$(389,800)$1,579,060
December 31, 2012 888,444 285,468 18,559  323,216 61,064 413,291 (403,118) 1,586,924
December 31, 2011 794,738 285,702 32,882  299,421 57,006 401,862 (412,729) 1,458,882
Capital Expenditures:                 
Year ended Dec. 31, 2013$100,146$15,554$0 $3,347$0$0$0$119,047
Year ended Dec. 31, 2012 81,965 13,812 0  2,658 0 0 0 98,435
Year ended Dec. 31, 2011 47,206 15,830 0  2,140 0 0 0 65,176

                
  Utility  Consolidated
(In thousands)     Assets     Consolidation/ 
MGE     notNonregulatedTransmission Elimination  
  Electric Gas Allocated Energy Investment Entries Total
Assets:               
December 31, 2013$899,257$265,694$19,853 $288,066$64,504$(6,731)$1,530,643
December 31, 2012 888,444 285,468 18,559  323,166 61,064 (23,050) 1,553,651
December 31, 2011 794,738 285,702 32,882  299,171 57,006 (35,706) 1,433,793
Capital Expenditures:               
Year ended Dec. 31, 2013$100,146$15,554$0 $3,347$0$0$119,047
Year ended Dec. 31, 2012 81,965 13,812 0  2,658 0 0 98,435
Year ended Dec. 31, 2011 47,206 15,830 0  2,140 0 0 65,176