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Segment Information | 6 Months Ended
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Jun. 30, 2016
Segment Reporting [Abstract] |
Segment Information | Segment Information - MGE Energy and MGE. MGE Energy operates in the following business segments: electric utility, gas utility, nonregulated energy, transmission investment, and all other. See MGE Energy's and MGE's 2015 Annual Report on Form 10-K for additional discussion of each of these segments. The following table s show segment information for MGE Energy's operations for the indicated periods:
(In thousands)MGE Energy |  | Electric |  | Gas |  | Non- Regulated Energy |  | Transmission Investment |  | All Others |  | Consolidation/ Elimination Entries |  | Consolidated Total
Three Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ | 100,329 | $ | 20,961 | $ | 286 | $ | - | $ | - | $ | - | $ | 121,576
Interdepartmental revenues |  | 567 |  | 6,141 |  | 10,919 |  | - |  | - |  | (17,627) |  | -
Total operating revenues |  | 100,896 |  | 27,102 |  | 11,205 |  | - |  | - |  | (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) |  | 15,346 |  | 3,792 |  | 9,342 |  | (3) |  | (265) |  | - |  | 28,212
Other income (deductions), net |  | 118 |  | (18) |  | - |  | 1,767 |  | 312 |  | - |  | 2,179
Interest (expense) income, net |  | (2,776) |  | (799) |  | (1,449) |  | - |  | 67 |  | - |  | (4,957)
Income before taxes |  | 12,688 |  | 2,975 |  | 7,893 |  | 1,764 |  | 114 |  | - |  | 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 revenues |  | 122 |  | 2,291 |  | 9,853 |  | - |  | - |  | (12,266) |  | -
Total operating revenues |  | 99,603 |  | 22,960 |  | 11,829 |  | - |  | - |  | (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) |  | 12,186 |  | 2,209 |  | 9,927 |  | - |  | (273) |  | - |  | 24,049
Other income (deductions), net |  | 16 |  | (25) |  | - |  | 2,290 |  | 165 |  | - |  | 2,446
Interest (expense) income, net |  | (2,768) |  | (790) |  | (1,507) |  | - |  | 57 |  | - |  | (5,008)
Income (loss) before taxes |  | 9,434 |  | 1,394 |  | 8,420 |  | 2,290 |  | (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 revenues |  | 1,023 |  | 11,238 |  | 21,896 |  | - |  | - |  | (34,157) |  | -
Total operating revenues |  | 194,560 |  | 86,036 |  | 22,664 |  | - |  | - |  | (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) |  | 26,468 |  | 13,004 |  | 18,878 |  | (4) |  | (603) |  | - |  | 57,743
Other income (deductions), net |  | 314 |  | (26) |  | - |  | 4,000 |  | 333 |  | - |  | 4,621
Interest (expense) income, net |  | (5,566) |  | (1,607) |  | (2,912) |  | - |  | 128 |  | - |  | (9,957)
Income (loss) before taxes |  | 21,216 |  | 11,371 |  | 15,966 |  | 3,996 |  | (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 revenues |  | 237 |  | 5,016 |  | 19,700 |  | - |  | - |  | (24,953) |  | -
Total operating revenues |  | 197,958 |  | 95,613 |  | 23,642 |  | - |  | - |  | (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) |  | 23,409 |  | 13,152 |  | 19,827 |  | - |  | (488) |  | - |  | 55,900
Other income (deductions), net |  | 106 |  | (26) |  | - |  | 4,171 |  | 300 |  | - |  | 4,551
Interest (expense) income, net |  | (5,587) |  | (1,594) |  | (3,025) |  | - |  | 107 |  | - |  | (10,099)
Income (loss) before taxes |  | 17,928 |  | 11,532 |  | 16,802 |  | 4,171 |  | (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 table s show segment information for MGE's operations for the indicated periods:
(In thousands)MGE |  | Electric |  | Gas |  | Non- Regulated Energy |  | Transmission Investment |  | Consolidation/ Elimination Entries |  | Consolidated Total
Three Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ | 100,336 | $ | 20,967 | $ | 286 | $ | - | $ | - | $ | 121,589
Interdepartmental revenues |  | 560 |  | 6,135 |  | 10,919 |  | - |  | (17,614) |  | -
Total operating revenues |  | 100,896 |  | 27,102 |  | 11,205 |  | - |  | (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)* |  | 11,232 |  | 2,611 |  | 6,174 |  | (3) |  | - |  | 20,014
Other income (deductions), net* |  | 74 |  | (32) |  | - |  | 1,058 |  | - |  | 1,100
Interest expense, net |  | (2,776) |  | (799) |  | (1,449) |  | - |  | - |  | (5,024)
Net income |  | 8,530 |  | 1,780 |  | 4,725 |  | 1,055 |  | - |  | 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 revenues |  | 117 |  | 2,289 |  | 9,853 |  | - |  | (12,259) |  | -
Total operating revenues |  | 99,603 |  | 22,960 |  | 11,829 |  | - |  | (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* |  | 9,068 |  | 1,666 |  | 6,547 |  | - |  | - |  | 17,281
Other (deductions) income, net* |  | (30) |  | (39) |  | - |  | 1,371 |  | - |  | 1,302
Interest expense, net |  | (2,768) |  | (790) |  | (1,507) |  | - |  | - |  | (5,065)
Net income |  | 6,270 |  | 837 |  | 5,040 |  | 1,371 |  | - |  | 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 revenues |  | 1,010 |  | 11,222 |  | 21,896 |  | - |  | (34,128) |  | -
Total operating revenues |  | 194,560 |  | 86,036 |  | 22,664 |  | - |  | (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)* |  | 19,854 |  | 8,473 |  | 12,470 |  | (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 income |  | 14,522 |  | 6,817 |  | 9,558 |  | 2,390 |  | - |  | 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 revenues |  | 227 |  | 5,009 |  | 19,700 |  | - |  | (24,936) |  | -
Total operating revenues |  | 197,958 |  | 95,613 |  | 23,642 |  | - |  | (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* |  | 17,949 |  | 8,539 |  | 13,083 |  | - |  | - |  | 39,571
Other income (deductions), net* |  | 19 |  | (51) |  | - |  | 2,496 |  | - |  | 2,464
Interest expense, net |  | (5,587) |  | (1,594) |  | (3,025) |  | - |  | - |  | (10,206)
Net income |  | 12,381 |  | 6,894 |  | 10,058 |  | 2,496 |  | - |  | 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.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8971-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8595-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8984-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9031-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8538-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8864-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8924-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 + Details
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