$MGEE
MGE ENERGY INC Stock $mgee

$mgee Overview Financials Valuation SEC Filings Company Website

2014 Q4 Form 10-K Financial Statement

#000116172815000003 Filed on February 26, 2015

Income Statement

Concept	2014 Q4	2013 Q4	2013 Q3
Revenue	$145.7M	$155.3M	$140.1M
YoY Change	-6.15%	13.33%	1.64%
Cost Of Revenue	$50.40M	$56.60M	$30.80M
YoY Change	-10.95%	20.43%	20.78%
Gross Profit	$95.30M	$98.70M	$109.3M
YoY Change	-3.44%	9.67%	-2.67%
Gross Profit Margin	65.41%	63.57%	78.02%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$10.50M	$9.900M	$9.700M
YoY Change	6.06%	2.06%	0.0%
% of Gross Profit	11.02%	10.03%	8.87%
Operating Expenses	$65.70M	$72.70M	$69.40M
YoY Change	-9.63%	2.83%	-4.28%
Operating Profit	$29.57M	$25.96M	$39.90M
YoY Change	13.88%	34.17%	0.03%
Interest Expense	-$5.100M	-$5.000M	$4.605M
YoY Change	2.0%	4.17%	-5.03%
% of Operating Profit	-17.25%	-19.26%	11.54%
Other Income/Expense, Net	-$700.0K	$900.0K	$3.750M
YoY Change	-177.78%	-57.14%	31.3%
Pretax Income	$23.80M	$21.90M	$39.05M
YoY Change	8.68%	31.14%	3.03%
Income Tax	$8.600M	$7.829M	$14.69M
% Of Pretax Income	36.13%	35.75%	37.63%
Net Earnings	$15.19M	$14.08M	$24.35M
YoY Change	7.88%	34.25%	3.01%
Net Earnings / Revenue	10.42%	9.07%	17.38%
Basic Earnings Per Share			$1.05
Diluted Earnings Per Share	$438.0K	$406.3K	$703.2K
COMMON SHARES
Basic Shares Outstanding	34.67M shares	34.67M shares	23.11M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2014 Q4	2013 Q4	2013 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$65.80M	$68.80M	$75.30M
YoY Change	-4.36%	48.28%	27.2%
Cash & Equivalents	$65.76M	$68.81M	$75.33M
Short-Term Investments
Other Short-Term Assets	$10.71M	$8.225M	$8.349M
YoY Change	30.22%	-3.37%	-6.03%
Inventory	$46.30M	$35.90M	$41.40M
Prepaid Expenses
Receivables	$41.61M	$44.89M	$37.44M
Other Receivables	$7.610M	$5.352M	$8.271M
Total Short-Term Assets	$250.5M	$220.6M	$213.9M
YoY Change	13.54%	-1.05%	-2.7%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.208B	$1.160B	$1.012B
YoY Change	4.13%	8.08%	4.62%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$68.87M	$65.59M	$67.00M
YoY Change	5.01%	7.42%	5.02%
Other Assets	$4.837M	$5.853M	$6.436M
YoY Change	-17.36%	-2.01%	-11.81%
Total Long-Term Assets	$1.439B	$1.358B	$1.430B
YoY Change	5.93%	-0.41%	6.32%
TOTAL ASSETS
Total Short-Term Assets	$250.5M	$220.6M	$213.9M
Total Long-Term Assets	$1.439B	$1.358B	$1.430B
Total Assets	$1.690B	$1.579B	$1.644B
YoY Change	7.0%	-0.5%	5.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$41.66M	$43.68M	$39.53M
YoY Change	-4.64%	0.38%	35.21%
Accrued Expenses	$16.30M	$16.40M	$13.90M
YoY Change	-0.61%	13.89%	2.96%
Deferred Revenue
YoY Change
Short-Term Debt	$7.000M	$0.00	$0.00
YoY Change
Long-Term Debt Due	$4.182M	$4.102M	$4.082M
YoY Change	1.95%	36.14%	53.06%
Total Short-Term Liabilities	$90.00M	$96.67M	$78.71M
YoY Change	-6.9%	27.53%	31.24%
LONG-TERM LIABILITIES
Long-Term Debt	$395.3M	$399.4M	$400.4M
YoY Change	-1.04%	11.42%	11.39%
Other Long-Term Liabilities	$50.27M	$52.36M	$52.25M
YoY Change	-3.99%	3.51%	7.32%
Total Long-Term Liabilities	$549.5M	$465.5M	$551.8M
YoY Change	18.06%	-18.8%	-2.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$90.00M	$96.67M	$78.71M
Total Long-Term Liabilities	$549.5M	$465.5M	$551.8M
Total Liabilities	$639.5M	$562.1M	$630.5M
YoY Change	13.77%	-13.38%	0.56%
SHAREHOLDERS EQUITY
Retained Earnings	$308.0M	$266.2M
YoY Change	15.71%	16.55%
Common Stock	$34.67M	$34.67M
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares	0.000 shares	0.000 shares
Shareholders Equity	$659.4M	$617.5M	$612.7M
YoY Change
Total Liabilities & Shareholders Equity	$1.694B	$1.579B	$1.644B
YoY Change	7.29%	-0.5%	5.05%

Cashflow Statement

Concept	2014 Q4	2013 Q4	2013 Q3
OPERATING ACTIVITIES
Net Income	$15.19M	$14.08M	$24.35M
YoY Change	7.88%	34.25%	3.01%
Depreciation, Depletion And Amortization	$10.50M	$9.900M	$9.700M
YoY Change	6.06%	2.06%	0.0%
Cash From Operating Activities	$7.800M	$31.70M	$42.50M
YoY Change	-75.39%	5.32%	-22.87%
INVESTING ACTIVITIES
Capital Expenditures	-$26.60M	-$26.90M	-$29.00M
YoY Change	-1.12%	-17.23%	10.27%
Acquisitions
YoY Change
Other Investing Activities	-$400.0K	-$800.0K	-$700.0K
YoY Change	-50.0%	33.33%	-30.0%
Cash From Investing Activities	-$27.00M	-$27.70M	-$29.70M
YoY Change	-2.53%	-16.57%	8.39%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.900M	-10.50M	20.20M
YoY Change	-62.86%	7.14%	-304.04%
NET CHANGE
Cash From Operating Activities	7.800M	31.70M	42.50M
Cash From Investing Activities	-27.00M	-27.70M	-29.70M
Cash From Financing Activities	-3.900M	-10.50M	20.20M
Net Change In Cash	-23.10M	-6.500M	33.00M
YoY Change	255.38%	-49.61%	85.39%
FREE CASH FLOW
Cash From Operating Activities	$7.800M	$31.70M	$42.50M
Capital Expenditures	-$26.60M	-$26.90M	-$29.00M
Free Cash Flow	$34.40M	$58.60M	$71.50M
YoY Change	-41.3%	-6.39%	-12.16%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2014	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9150000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1898000	USD
CY2014	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-1080000	USD
CY2014	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-729000	USD
CY2014	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-2115000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	10399000	USD
CY2014	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	-720000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	19804000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2756000	USD
CY2014	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	7740000	USD
CY2014	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	3321000	USD
CY2014Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	24441000	USD
CY2014Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	4182000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	128762000	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	92676000	USD
CY2014	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	2185000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1297000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-96158000	USD
CY2014	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	38429000	USD
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	4103000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	7000000	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-130000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-35662000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-3058000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	68813000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	65755000	USD
CY2014	us-gaap	Interest Paid InterestPaid	20478000	USD
CY2014	us-gaap	Income Taxes Paid IncomeTaxesPaid	19579000	USD
CY2014	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	644000	USD
CY2013	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-770000	USD
CY2013	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	-414000	USD
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	37107000	USD
CY2013	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1339000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	140267000	USD
CY2013	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	3720000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2488000	USD
CY2013	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	3827000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	4111000	USD
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	119047000	USD
CY2013	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	34765000	USD
CY2013	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	43012000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-121922000	USD
CY2013	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2448000	USD
CY2013	us-gaap	Income Taxes Paid IncomeTaxesPaid	8046000	USD
CY2013	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-117000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	46357000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	858000	USD
CY2013	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	0	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	85000000	USD
CY2013	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	7404000	USD
CY2013	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	13303000	USD
CY2013	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1205000	USD
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	22456000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9434000	USD
CY2013	us-gaap	Interest Paid InterestPaid	17991000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-272000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	146004000	USD
CY2012	us-gaap	Interest Paid InterestPaid	19499000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	5188000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	-2731000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-844000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-39463000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-101353000	USD
CY2012	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1283000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1457000	USD
CY2012	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	2419000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	0	USD
CY2012	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	18353000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	3544000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	7146000	USD
CY2012	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	28857000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9079000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	98435000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	35951000	USD
CY2012	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2498000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	28000000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	30668000	USD
CY2012	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	6208000	USD
CY2012	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	12536000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	41169000	USD
CY2012	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	2508000	USD
CY2014	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	0	USD
CY2013	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	10000	USD
CY2012	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	3000	USD
CY2014	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	4452000	USD
CY2013	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-10845000	USD
CY2012	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-6992000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	10317000	USD
CY2013	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	9892000	USD
CY2014	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1569000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	49884000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	38365000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	44797000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-4093000	USD
CY2013	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-2514000	USD
CY2014	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	5693000	USD
CY2014	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-4195000	USD
CY2013	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	6271000	USD
CY2012	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	425000	USD
CY2012	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2014	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2013	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	6757000	USD
CY2014Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	17121000	USD
CY2013Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	16662000	USD
CY2014Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	8098000	USD
CY2013Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	5206000	USD
CY2014Q4	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	21036000	USD
CY2013Q4	us-gaap	Energy Related Inventory Gas Stored Underground EnergyRelatedInventoryGasStoredUnderground	13988000	USD
CY2014Q4	us-gaap	Prepaid Taxes PrepaidTaxes	38910000	USD
CY2013Q4	us-gaap	Prepaid Taxes PrepaidTaxes	19106000	USD
CY2014Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	8360000	USD
CY2013Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	6377000	USD
CY2014Q4	us-gaap	Other Assets Current OtherAssetsCurrent	10711000	USD
CY2013Q4	us-gaap	Other Assets Current OtherAssetsCurrent	8225000	USD
CY2014Q4	us-gaap	Assets Current AssetsCurrent	253959000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	220601000	USD
CY2014Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	156823000	USD
CY2013Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	107166000	USD
CY2014Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4837000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5853000	USD
CY2014Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	19029000	USD
CY2013Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	141415000	USD
CY2014Q4	us-gaap	Investments Investments	71760000	USD
CY2013Q4	us-gaap	Investments Investments	67952000	USD
CY2013	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1500000	USD
CY2013	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	1660000	USD
CY2013Q4	us-gaap	Assets Assets	1579060000	USD
CY2013Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	4102000	USD
CY2014Q4	us-gaap	Assets Assets	1697666000	USD
CY2014Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	41655000	USD
CY2013Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	43684000	USD
CY2014Q4	mgee	Accrued Interest And Taxes AccruedInterestAndTaxes	5086000	USD
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1697666000	USD
CY2013Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	399414000	USD
CY2014Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	1054657000	USD
CY2013Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	1016924000	USD
CY2014Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2013Q4	mgee	Accrued Interest And Taxes AccruedInterestAndTaxes	5661000	USD
CY2014Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	11241000	USD
CY2013Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	10731000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	0	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	1711000	USD
CY2014Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	13931000	USD
CY2013Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	9489000	USD
CY2014Q4	us-gaap	Liabilities Current LiabilitiesCurrent	89996000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	96666000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	342045000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	284791000	USD
CY2014Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	1223000	USD
CY2013Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	1413000	USD
CY2014Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	22715000	USD
CY2013Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	19792000	USD
CY2014Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	90201000	USD
CY2013Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	49184000	USD
CY2014Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	50269000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	52360000	USD
CY2014Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	553013000	USD
CY2013Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	465470000	USD
CY2014Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	316268000	USD
CY2013Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	316268000	USD
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	308007000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	266197000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	458000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	377000	USD
CY2014Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	395256000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1579060000	USD
CY2014Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	2181000	USD
CY2013Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	2193000	USD
CY2014Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4329000	USD
CY2014Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	420000	USD
CY2014Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2014Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	75000000	shares
CY2013Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4219000	USD
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2013Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	750000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	659401000	USD
CY2014Q4	us-gaap	Common Stock Value CommonStockValue	34668000	USD
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	34668000	USD
CY2014Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	41614000	USD
CY2013Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	44890000	USD
CY2013Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	5352000	USD
CY2014Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	7610000	USD
CY2014Q4	mgee	Property Plant And Equipment Net Before Construction In Progress PropertyPlantAndEquipmentNetBeforeConstructionInProgress	1189077000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1208106000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1160224000	USD
CY2013Q4	mgee	Property Plant And Equipment Net Before Construction In Progress PropertyPlantAndEquipmentNetBeforeConstructionInProgress	1018809000	USD
CY2014Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	6901000	USD
CY2013Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	7750000	USD
CY2013Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	57930000	USD
CY2014Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	46560000	USD
CY2014Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	31262000	USD
CY2013Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	31982000	USD
CY2014Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	34668000	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	34668000	shares
CY2014Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	34668000	shares
CY2013Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	34668000	shares
CY2014Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	0	USD
CY2013Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	13538000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	15071000	USD
CY2014Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	0	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	550952000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	579429000	USD
CY2014	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	38429000	USD
CY2013	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	37107000	USD
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	35951000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	81000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-18000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	283000	USD
CY2014	dei	Entity Registrant Name EntityRegistrantName	MGE Energy Inc
CY2014	dei	Document Period End Date DocumentPeriodEndDate	2014-12-31
CY2014	dei	Amendment Flag AmendmentFlag	false
CY2014	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
CY2014	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2014Q4	dei	Entity Public Float EntityPublicFloat	1365673259	USD
CY2014Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	34668370	shares
CY2012	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	13500000	USD
CY2014Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2014	us-gaap	Use Of Estimates UseOfEstimates	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:27pt;' >Use of Estimates - MGE Energy and MGE.</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:45pt;' >In order to prepare consolidated financial statements in conformity with GAAP, management must make estimates and assumptions. These estimates could affect reported amounts of assets, liabilities, and disclosures at the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from management's estimates.</font></p></div>
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Other Comprehensive Income FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome	0	USD
CY2014Q4	mgee	Accounts Receivable Late Payment Charge On Unpaid Receivables AccountsReceivableLatePaymentChargeOnUnpaidReceivables	0.01	pure
CY2014Q4	mgee	Public Utilities Inventory Emissions Allowance PublicUtilitiesInventoryEmissionsAllowance	100000	USD
CY2013Q4	mgee	Public Utilities Inventory Emissions Allowance PublicUtilitiesInventoryEmissionsAllowance	100000	USD
CY2013Q4	mgee	Public Utilities Inventory Renewable Energy Credit Allowance PublicUtilitiesInventoryRenewableEnergyCreditAllowance	600000	USD
CY2014Q4	mgee	Public Utilities Inventory Renewable Energy Credit Allowance PublicUtilitiesInventoryRenewableEnergyCreditAllowance	800000	USD
CY2014Q4	mgee	Purchase Gas Adjustment Over Under Collected PurchaseGasAdjustmentOverUnderCollected	1200000	USD
CY2013Q4	mgee	Purchase Gas Adjustment Over Under Collected PurchaseGasAdjustmentOverUnderCollected	1700000	USD
CY2014Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	8400000	USD
CY2013Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	9000000	USD
CY2013	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	1500000	USD
CY2014	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	1600000	USD
CY2014	mgee	License Fee Tax Rate Electric Retail Sales LicenseFeeTaxRateElectricRetailSales	0.0319	pure
CY2014	mgee	License Fee Tax Rate Electric Resale By Purchaser LicenseFeeTaxRateElectricResaleByPurchaser	0.0159	pure
CY2014	mgee	License Fee Tax Rate Natural Gas LicenseFeeTaxRateNaturalGas	0.0097	pure
CY2014	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	14600000	USD
CY2013	us-gaap	Excise And Sales Taxes ExciseAndSalesTaxes	13800000	USD
CY2014	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2014Q4	mgee	Public Utilities Service Area Electric Territory PublicUtilitiesServiceAreaElectricTerritory	316	sqmi
CY2014Q4	mgee	Public Utilities Service Area Gas Territory PublicUtilitiesServiceAreaGasTerritory	1678	sqmi
CY2013	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2012	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2014Q4	mgee	Variable Interest Entity Purchase Power Agreement Plant Capacity Other VariableInterestEntityPurchasePowerAgreementPlantCapacityOther	61	MW
CY2013Q4	mgee	Variable Interest Entity Purchase Power Agreement Plant Capacity Other VariableInterestEntityPurchasePowerAgreementPlantCapacityOther	61	MW
CY2014Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1964000	USD
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1736000	USD
CY2014Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	2729000	USD
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	2365000	USD
CY2014Q4	us-gaap	Equity Method Investments EquityMethodInvestments	68872000	USD
CY2013Q4	us-gaap	Equity Method Investments EquityMethodInvestments	65587000	USD
CY2014Q4	us-gaap	Other Investments OtherInvestments	159000	USD
CY2013Q4	us-gaap	Other Investments OtherInvestments	0	USD
CY2013Q4	mgee	Available For Sale Securities Gross Unrealized Gain Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments	629000	USD
CY2014Q4	mgee	Available For Sale Securities Gross Unrealized Gain Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments	765000	USD
CY2014	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	38000	USD
CY2014	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	21000	USD
CY2013	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	2000	USD
CY2013	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	39000	USD
CY2012	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	USD
CY2012	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	0	USD
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CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	4553000	USD
CY2013Q4	mgee	Deferred Tax Assets Accrued Expenses DeferredTaxAssetsAccruedExpenses	17195000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	1553000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	26361000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	263881000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	26361000	USD
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CY2013Q4	us-gaap	Regulatory Assets RegulatoryAssets	113543000	USD
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CY2014Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	22715000	USD
CY2014Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	252000	USD
CY2013Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	277000	USD
CY2014Q4	us-gaap	Long Term Debt LongTermDebt	399690000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	327877000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	4182000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	4268000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	34358000	USD
CY2014	mgee	Short Term Debt Weighted Average Interest Rate During Period ShortTermDebtWeightedAverageInterestRateDuringPeriod	0.0024	pure
CY2013	mgee	Short Term Debt Weighted Average Interest Rate During Period ShortTermDebtWeightedAverageInterestRateDuringPeriod	0.0018	pure
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CY2014	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	9000000	USD
CY2014	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	182000	USD
CY2013	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	6992000	USD
CY2013	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	32000000	USD
CY2012	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	16000000	USD
CY2012	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	1154000	USD
CY2014	mgee	Fair Value Inputs Delivery Points Basis Adjustment On Peak FairValueInputsDeliveryPointsBasisAdjustmentOnPeak	0.981	pure
CY2014	mgee	Fair Value Inputs Delivery Points Basis Adjustment Off Peak FairValueInputsDeliveryPointsBasisAdjustmentOffPeak	0.95	pure
CY2014	mgee	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Regulatory Liabilities Assets FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInRegulatoryLiabilitiesAssets	10642000	USD
CY2013	mgee	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Regulatory Liabilities Assets FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInRegulatoryLiabilitiesAssets	7718000	USD
CY2012	mgee	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Regulatory Liabilities Assets FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInRegulatoryLiabilitiesAssets	-31685000	USD
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CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-2618000	USD
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CY2013	mgee	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Current Assets FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInCurrentAssets	-108000	USD
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CY2014	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	26382000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	23726000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	13370000	USD
CY2014	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales	125000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales	2000	USD
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CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	20998000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	8457000	USD
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CY2013Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	-64628000	USD
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CY2014Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	10451000	USD
CY2014Q4	mgee	Deferred Tax Assets Accrued Expenses DeferredTaxAssetsAccruedExpenses	32091000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	1211000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	22331000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5957000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	110676000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	70000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	110606000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-338563000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-286502000	USD
CY2013Q4	mgee	Deferred Tax Liabilities Equity Method Investments DeferredTaxLiabilitiesEquityMethodInvestments	32696000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	81970000	USD
CY2013Q4	mgee	Deferred Tax Liabilities Deductible Prepayments DeferredTaxLiabilitiesDeductiblePrepayments	7508000	USD
CY2012	mgee	Unrecognized Tax Benefits Decrease Resulting From Interest Expense On Uncertain Tax Positions UnrecognizedTaxBenefitsDecreaseResultingFromInterestExpenseOnUncertainTaxPositions	0	USD
CY2014	mgee	Unrecognized Tax Benefits Decrease Resulting From Interest Expense On Uncertain Tax Positions UnrecognizedTaxBenefitsDecreaseResultingFromInterestExpenseOnUncertainTaxPositions	97000	USD
CY2013	mgee	Unrecognized Tax Benefits Decrease Resulting From Interest Expense On Uncertain Tax Positions UnrecognizedTaxBenefitsDecreaseResultingFromInterestExpenseOnUncertainTaxPositions	275000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	88000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	92000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	195000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	10369000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	82165000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	1402000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1995000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	44994000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	26838000	USD
CY2013Q4	mgee	Deferred Tax Liabilities Pension And Other Postretirement Benefits DeferredTaxLiabilitiesPensionAndOtherPostretirementBenefits	34478000	USD
CY2014Q4	mgee	Deferred Tax Liabilities Pension And Other Postretirement Benefits DeferredTaxLiabilitiesPensionAndOtherPostretirementBenefits	57847000	USD
CY2014Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	449169000	USD
CY2013Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	368472000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2363000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3204000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2364000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2365000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	314000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	216000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	101000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	62000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	98000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	610000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	618000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	424000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	377000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	580000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	401000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1226000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1602000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	141000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	40000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	1400000	USD
CY2014Q4	mgee	Unrecognized Tax Benefits Current Period Tax Positions Permanent Differences UnrecognizedTaxBenefitsCurrentPeriodTaxPositionsPermanentDifferences	0	USD
CY2013Q4	mgee	Unrecognized Tax Benefits Current Period Tax Positions Permanent Differences UnrecognizedTaxBenefitsCurrentPeriodTaxPositionsPermanentDifferences	0	USD
CY2012Q4	mgee	Unrecognized Tax Benefits Current Period Tax Positions Permanent Differences UnrecognizedTaxBenefitsCurrentPeriodTaxPositionsPermanentDifferences	0	USD
CY2013	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2300000	USD
CY2014	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2500000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2100000	USD
CY2014	mgee	Defined Benefit Plan Transition Obligation Amortization Period DefinedBenefitPlanTransitionObligationAmortizationPeriod	P20Y
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1400000	USD
CY2014	mgee	Regional Transmission Organization Reduction To Sales And Purchased Power Expense From Net Basis Reporting RegionalTransmissionOrganizationReductionToSalesAndPurchasedPowerExpenseFromNetBasisReporting	91100000	USD
CY2013	mgee	Regional Transmission Organization Reduction To Sales And Purchased Power Expense From Net Basis Reporting RegionalTransmissionOrganizationReductionToSalesAndPurchasedPowerExpenseFromNetBasisReporting	78000000	USD
CY2012	mgee	Regional Transmission Organization Reduction To Sales And Purchased Power Expense From Net Basis Reporting RegionalTransmissionOrganizationReductionToSalesAndPurchasedPowerExpenseFromNetBasisReporting	75900000	USD
CY2014	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:45pt;' >As part of its regular operations, MGE enters into contracts, including options, swaps, futures, forwards, and other contractual commitments, to manage its exposure to commodity </font><font style='font-family:Times New Roman;font-size:10pt;' >prices and gas revenues. To the extent that these contracts are derivatives, MGE assesses whether or not the normal purchases or normal sales exclusion applies. For contracts to which this exclusion cannot be applied, MGE Energy and MGE recognize such deri</font><font style='font-family:Times New Roman;font-size:10pt;' >vatives in the consolidated balance sheets at fair value</font><font style='font-family:Times New Roman;font-size:10pt;' >.</font><font style='font-family:Times New Roman;font-size:10pt;' > The majority of MGE's derivative activities are conducted in accordance with its electric and gas risk management program, which is approved by the PSCW and limits the volume MGE can hedge with spec</font><font style='font-family:Times New Roman;font-size:10pt;' >ific risk management strategies. The maximum length of time over which cash flows related to energy commodities can be hedged </font><font style='font-family:Times New Roman;font-size:10pt;' >is</font><font style='font-family:Times New Roman;font-size:10pt;' > four</font><font style='font-family:Times New Roman;font-size:10pt;' > years. If the derivative qualifies for regulatory deferral, the derivatives are marked to fair value and are offset with a</font><font style='font-family:Times New Roman;font-size:10pt;' > corresponding regulatory asset or liability. The deferred gain or loss is recognized in earnings in the delivery month applicable to the instrument. Gains and losses related to hedges qualifying for regulatory treatment are recoverable in gas rates throug</font><font style='font-family:Times New Roman;font-size:10pt;' >h the PGA or in electric rates as a component of the fuel rules mechanism. </font></p></div>
CY2014Q4	mgee	Counterparties In Default CounterpartiesInDefault	0
CY2014Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	122841000	USD
CY2014Q4	us-gaap	Purchase Obligation Due In Second Year PurchaseObligationDueInSecondYear	78534000	USD
CY2014Q4	us-gaap	Purchase Obligation Due In Third Year PurchaseObligationDueInThirdYear	63703000	USD
CY2014Q4	us-gaap	Purchase Obligation Due In Fourth Year PurchaseObligationDueInFourthYear	57828000	USD
CY2014Q4	us-gaap	Purchase Obligation Due In Fifth Year PurchaseObligationDueInFifthYear	41360000	USD
CY2014Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	19744000	USD
CY2014Q3	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	862000	USD
CY2014Q4	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	891000	USD
CY2013	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	296000	USD
CY2013	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	744000	USD
CY2013	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	24000	USD
CY2013	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1015000	USD
CY2014	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:45pt;' >MGE makes available to qualifying customers a financing program for the purchase and installation of energy-related equipment that will provide more efficient use of utility service at</font><font style='font-family:Times New Roman;font-size:10pt;' > the customer</font><font style='font-family:Times New Roman;font-size:10pt;' >'</font><font style='font-family:Times New Roman;font-size:10pt;' >s property. MGE is party to a chattel paper purchase agreement with a financial institution under which it can sell or finance an undivided interest with recourse, in up to $</font><font style='font-family:Times New Roman;font-size:10pt;' >10.0</font><font style='font-family:Times New Roman;font-size:10pt;' > million</font><font style='font-family:Times New Roman;font-size:10pt;' > of the financing program receiv</font><font style='font-family:Times New Roman;font-size:10pt;' >ables, until </font><font style='font-family:Times New Roman;font-size:10pt;' >July </font><font style='font-family:Times New Roman;font-size:10pt;' >31, 20</font><font style='font-family:Times New Roman;font-size:10pt;' >15</font><font style='font-family:Times New Roman;font-size:10pt;' >.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:45pt;' >MGE retains the servicing responsibility for these receivables.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:45pt;' >MGE accounts for servicing rights under the amortization method. Initial determination of the servicing asset fair value is based on the present value of the estimated future </font><font style='font-family:Times New Roman;font-size:10pt;' >cash flows. The discount rate is based on the PSCW authorized weighted cost of capital.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:45pt;' >MGE maintains responsibility for collecting and remitting loan payments from customers to the financial institution and does not retain any interest in the assets sold</font><font style='font-family:Times New Roman;font-size:10pt;' > to the financial institution. </font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:45pt;' >MGE would be required to perform under its guarantee if a customer defaulted on its loan. The energy-related equipment installed at the customer sites is used to secure the customer loans. The loan bal</font><font style='font-family:Times New Roman;font-size:10pt;' >ances outstanding at </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2014</font><font style='font-family:Times New Roman;font-size:10pt;' >, approximate the fair value of the energy-related equipment acting as collateral. The length of the MGE guarantee to the financial institution varies from one to ten years depending on the term of the </font><font style='font-family:Times New Roman;font-size:10pt;' >underlying </font><font style='font-family:Times New Roman;font-size:10pt;' >custo</font><font style='font-family:Times New Roman;font-size:10pt;' >mer loan.</font></p></div>
CY2014	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2500000	USD
CY2013	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2700000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2600000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1553000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1346000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	872000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	419000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	258000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	7938000	USD
CY2013Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	19359000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	18768000	USD
CY2014	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	68000	USD
CY2014	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1077000	USD
CY2014	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	343000	USD
CY2014	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-417000	USD
CY2014Q1	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	98852000	USD
CY2014Q2	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	96697000	USD
CY2014Q3	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	112869000	USD
CY2014Q4	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	86431000	USD
CY2014Q1	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	110713000	USD
CY2014Q2	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	31218000	USD
CY2014Q3	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	21404000	USD
CY2014Q4	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	58385000	USD
CY2014Q1	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	680000	USD
CY2014Q2	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	850000	USD
CY2014Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	210245000	USD
CY2014Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	128765000	USD
CY2013Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.7
CY2014Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	135135000	USD
CY2014Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	145707000	USD
CY2014Q1	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	166274000	USD
CY2014Q2	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	104324000	USD
CY2014Q3	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	95015000	USD
CY2014Q4	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	116141000	USD
CY2014Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	43971000	USD
CY2014Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	40120000	USD
CY2014Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	29566000	USD
CY2014Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16265000	USD
CY2014Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9034000	USD
CY2014Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14286000	USD
CY2014Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8600000	USD
CY2014Q1	us-gaap	Net Income Loss NetIncomeLoss	27717000	USD
CY2014Q2	us-gaap	Net Income Loss NetIncomeLoss	14087000	USD
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	23329000	USD
CY2014Q4	us-gaap	Net Income Loss NetIncomeLoss	15186000	USD
CY2014Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.272
CY2014Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.283
CY2014Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.283
CY2013Q4	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	93781000	USD
CY2013Q4	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	60089000	USD
CY2013Q4	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1393000	USD
CY2013Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	155263000	USD
CY2013Q4	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	129301000	USD
CY2013Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	25962000	USD
CY2013Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7829000	USD
CY2013Q4	us-gaap	Net Income Loss NetIncomeLoss	14077000	USD
CY2013Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.272
CY2013Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	167237000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13678000	USD
CY2013Q1	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1276000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	22584000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	37628000	USD
CY2013Q1	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	72467000	USD
CY2013Q1	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	129609000	USD
CY2013Q1	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	93494000	USD
CY2013Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.263
CY2013Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.263
CY2013Q2	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	30042000	USD
CY2013Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	128288000	USD
CY2013Q2	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	96846000	USD
CY2013Q2	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	103791000	USD
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8660000	USD
CY2013Q2	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1400000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	13891000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	24497000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	39900000	USD
CY2013Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14692000	USD
CY2013Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	140099000	USD
CY2013Q3	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	18864000	USD
CY2013Q3	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1399000	USD
CY2013Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.272
CY2013Q3	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	100199000	USD
CY2013Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.41
CY2013Q1	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	-1366000	USD
CY2014Q4	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	-5780000	USD
CY2013Q4	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	-4056000	USD
CY2013Q3	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	119836000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	24353000	USD
CY2014Q1	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	11000	USD
CY2014Q2	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	-1320000	USD
CY2014Q3	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	-2505000	USD
CY2013Q3	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	-855000	USD
CY2013Q2	mgee	Interest Expense And Other Income Net InterestExpenseAndOtherIncomeNet	-1946000	USD
CY2014Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.8
CY2014Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.41
CY2014Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.67
CY2014Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.44
CY2013Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.65
CY2013Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.4
CY2013	us-gaap	Cash Dividends Paid To Parent Company By Consolidated Subsidiaries CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries	52366000	USD
CY2012	us-gaap	Cash Dividends Paid To Parent Company By Consolidated Subsidiaries CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries	44343000	USD
CY2014	us-gaap	Cash Dividends Paid To Parent Company By Consolidated Subsidiaries CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries	47859000	USD
CY2013Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	4969711	USD
CY2014	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	1898300	USD
CY2014	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	15092	USD
CY2014	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	2134446	USD
CY2014Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	4748657	USD
CY2013	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	2373342	USD
CY2013	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	37200	USD
CY2012Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	4816118	USD
CY2013	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	2256949	USD
CY2011Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	4100333	USD
CY2012	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	2825300	USD
CY2012	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	44400	USD
CY2012	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	2153915	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	0	USD
CY2014	dei	Trading Symbol TradingSymbol	MGEE
CY2013Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	200000	USD
CY2013	mgee	Fair Value Inputs Delivery Points Basis Adjustment On Peak FairValueInputsDeliveryPointsBasisAdjustmentOnPeak	0.942	pure
CY2013	mgee	Fair Value Inputs Delivery Points Basis Adjustment Off Peak FairValueInputsDeliveryPointsBasisAdjustmentOffPeak	0.926	pure
CY2013Q4	mgee	Counterparties In Net Liability Position CounterpartiesInNetLiabilityPosition	0	USD
CY2014Q4	mgee	Counterparties In Net Liability Position CounterpartiesInNetLiabilityPosition	100000	USD
CY2014Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	7000000	USD
CY2013Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2014	mgee	Stockholders Equity Value Cash In Lieu Of Fractional Shares Related To Stock Split StockholdersEquityValueCashInLieuOfFractionalSharesRelatedToStockSplit	80000	USD
CY2014Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	2200000	USD
CY2013Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	500000	USD
CY2013Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2012	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	1300000	USD
CY2013Q4	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	1.5	pure
CY2014	dei	Document Type DocumentType	10-K
CY2014	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2014	dei	Entity Central Index Key EntityCentralIndexKey	0001161728
CY2014	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2014	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2014	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2014	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2014Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.002	pure
CY2013Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0	pure
CY2012Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0	pure
CY2012Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2014	us-gaap	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2013	us-gaap	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2012	us-gaap	Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.001	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.003	pure
CY2014Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	2200000	USD
CY2012Q4	us-gaap	Assets Assets	1586924000	USD
CY2014	us-gaap	Defined Benefit Plans Estimated Future Employer Contributions In Next Fiscal Year DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear	10000000	USD
CY2014Q4	mgee	Defined Benefit Plans Expected Future Employer Contributions Year Two DefinedBenefitPlansExpectedFutureEmployerContributionsYearTwo	0	USD
CY2014Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	2200000	USD
CY2014	mgee	Operating Leases Renewal Option Term OperatingLeasesRenewalOptionTerm	P1Y
CY2014Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	327500000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	315000000	USD
CY2014	mgee	Utilities Operating Expense Excluding Depreciation And Amortization UtilitiesOperatingExpenseExcludingDepreciationAndAmortization	441059000	USD
CY2013	mgee	Utilities Operating Expense Excluding Depreciation And Amortization UtilitiesOperatingExpenseExcludingDepreciationAndAmortization	424062000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	3482000	USD
CY2012	mgee	Utilities Operating Expense Excluding Depreciation And Amortization UtilitiesOperatingExpenseExcludingDepreciationAndAmortization	389853000	USD
CY2014Q4	mgee	Deferred Tax Assets Future Federal Tax Benefits DeferredTaxAssetsFutureFederalTaxBenefits	4092000	USD
CY2013Q4	mgee	Deferred Tax Assets Future Federal Tax Benefits DeferredTaxAssetsFutureFederalTaxBenefits	0	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2000000	USD
CY2014Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.272
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	617510000	USD

Files In Submission

Name	View Source	Status
0001161728-15-000003-index-headers.html	Edgar Link	pending
0001161728-15-000003-index.html	Edgar Link	pending
0001161728-15-000003.txt	Edgar Link	pending
0001161728-15-000003-xbrl.zip	Edgar Link	pending
10k_2014.pdf	Edgar Link	pending
ex12_1.htm	Edgar Link	pending
ex12_2.htm	Edgar Link	pending
ex21.htm	Edgar Link	pending
ex23_1.htm	Edgar Link	pending
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ex32_4.htm	Edgar Link	pending
f10k_2014.htm	Edgar Link	pending
f10k_2014002.gif	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
mgee-20141231.xml	Edgar Link	completed
mgee-20141231.xsd	Edgar Link	pending
mgee-20141231_cal.xml	Edgar Link	unprocessable
mgee-20141231_def.xml	Edgar Link	unprocessable
mgee-20141231_lab.xml	Edgar Link	unprocessable
mgee-20141231_pre.xml	Edgar Link	unprocessable
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report.css	Edgar Link	pending
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$MGEE
MGE ENERGY INC Stock $mgee

2014 Q4 Form 10-K Financial Statement

#000116172815000003 Filed on February 26, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MGEE MGE ENERGY INC Stock $mgee

2014 Q4 Form 10-K Financial Statement

#000116172815000003 Filed on February 26, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MGEE
MGE ENERGY INC Stock $mgee