XML 55 R47.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Noncontrolling Interest (Tables) (MGE [Member]) | 12 Months Ended
--- | ---
Dec. 31, 2013
MGE [Member] |
Noncontrolling Interest [Line Items] |
Noncontrolling Interest in Balance Sheet | 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 |
(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.
Net Income Attributable to Noncontrolling Interest, Net of Tax | 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.

X
- Definition Tabular disclosure of noncontrolling interest included in balance sheet. + References No definition available. + Details
Name: | mgee_NoncontrollingInterestBalanceSheetTableTextBlock
Namespace Prefix: | mgee_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of net income attributable to noncontrolling interest, net of tax. + References No definition available. + Details
Name: | mgee_NoncontrollingInterestNetIncomeTableTextBlock
Namespace Prefix: | mgee_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MinorityInterestLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration