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Noncontrolling Interest (MGE [Member]) | 12 Months Ended
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Dec. 31, 2013
MGE [Member] |
Noncontrolling Interest [Line Items] |
Noncontrolling Interest | Noncontrolling Interest - MGE. The noncontrolling interest on MGE's balance sheet at December 31 was as follows:
| (In thousands) |  | 2013 |  | 2012 |
| MGE Power Elm Road (a) | $ | 69,876 | $ | 69,803 |
| MGE Power West Campus (a) |  | 29,089 |  | 30,682 |
| MGE Transco (b) |  | 19,998 |  | 16,985 |
| Total noncontrolling interest | $ | 118,963 | $ | 117,470 |
The net income attributable to noncontrolling interest, net of tax, for the years ended December 31, 2013, 2012, and 2011 was as follows:
| (In thousands) |  | 2013 |  | 2012 |  | 2011 |
| MGE Power Elm Road (a) | $ | 17,373 | $ | 14,837 | $ | 14,576 |
| MGE Power West Campus (a) |  | 7,657 |  | 7,506 |  | 7,501 |
| MGE Transco (b) |  | 2,408 |  | 2,146 |  | 1,893 |
| Net income attributable to noncontrolling interest, net of tax | $ | 27,438 | $ | 24,489 | $ | 23,970 |
(a) MGE Power Elm Road and MGE Power West Campus are not su bsidiaries of MGE; however, they have been consolidated in the consolidated financial statements of MGE (see Footnote 2). MGE Power Elm Road and MGE Power West Campus are 100% owned by MGE Power, and MGE Power is 100% owned by MGE Energy. MGE Energy's proportionate share of the equity and net income (through its wholly owned subsidiary MGE Power) of MGE Power Elm Road and MGE Power West Campus is classified within the MGE financial statements as noncontrolling interest. (b) At December 31, 2013, MGE is the majority owner, and MGE Energy is the minority owner, of MGE Transco. MGE Energy's proportionate share of the equity and net income of MGE Transco is classified within the MGE financial statements as noncontrolling interest.

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- Definition The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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