2.4.0.8030030 - Disclosure - Commitments and Contingencies (Tables)truefalsefalse1false
falsefalseFROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0001161728duration2013-01-01T00:00:002013-06-30T00:00:001true
1mgee_CommitmentsAndContingenciesTablesAbstractmgee_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00falsefalsefalse | xbrli:stringItemTypestringfalse0
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2mgee_ChattelPaperPrincipalPaymentsCommitmentsTableTextBlockmgee_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel| 1falsefalsefalse00<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"><font style="FONT-STYLE: italic;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: left;">(In thousands)</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2013</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2014</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2015</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2016</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2017</font></td><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td></tr><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: left;">Chattel Paper</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">372</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">577</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">891</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">815</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: right;">405</font></td><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td></tr></table></div>falsefalsefalse | nonnum:textBlockItemTypenaTabular disclosure of short- and long-term commitments for principal payments related to the chattel paper agreement.No definition available.false0
3false
2mgee_PurchaseCommitmentsTableTextBlockmgee_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel| 1falsefalsefalse00<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"><font style="FONT-STYLE: italic;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">(In thousands)</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2013</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2014</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2015</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2016</font></td><td style="width: 10px; text-align:center;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;"><font style="FONT-WEIGHT: bold;FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;TEXT-ALIGN: center;">2017</font></td><td style="width: 38px; text-align:center;border-color:#000000;min-width:38px;"> </td></tr><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">Coal</font><sup>(a)</sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">14,686</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">16,287</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">9,921</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">3,770</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">1,040</font></td><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td></tr><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">Natural gas supply</font><sup>(b)</sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">14,178</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">13,836</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">0</font></td><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td></tr><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">Purchase power</font><sup>(c)</sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">49,513</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">48,593</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">47,667</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">48,697</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">49,717</font></td><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td></tr><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">Other</font><sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">1,798</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">0</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"> </td><td style="width: 64px; border-bottom-style:solid;border-bottom-width:1px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">0</font></td><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td></tr><tr style="height: 15px"><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td><td style="width: 179px; text-align:left;border-color:#000000;min-width:179px;"> <sup></sup></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">80,175</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">78,716</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">57,588</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">52,467</font></td><td style="width: 10px; text-align:left;border-color:#000000;min-width:10px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:double;border-bottom-width:3px;text-align:right;border-color:#000000;min-width:64px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">50,757</font></td><td style="width: 38px; text-align:left;border-color:#000000;min-width:38px;"> </td></tr></table></div>falsefalsefalse | nonnum:textBlockItemTypenaTabular disclosure of short- and long-term commitments for purchase contracts over the next five years.No definition available.false0
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