MGE Energy Inc Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities:
Net Income	$ 80,319us-gaap_NetIncomeLoss	$ 74,905us-gaap_NetIncomeLoss	$ 64,446us-gaap_NetIncomeLoss
Items not affecting cash:
Depreciation and amortization	40,695	38,838	38,707
Deferred income taxes	49,884us-gaap_DeferredIncomeTaxExpenseBenefit	38,365us-gaap_DeferredIncomeTaxExpenseBenefit	44,797us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for doubtful receivables	1,898us-gaap_ProvisionForDoubtfulAccounts	2,448us-gaap_ProvisionForDoubtfulAccounts	2,498us-gaap_ProvisionForDoubtfulAccounts
Employee benefit plan expenses	(1,080)	13,303	18,353
Equity earnings in ATC	(9,150)	(9,434)	(9,079)
Other items	729us-gaap_OtherNoncashIncomeExpense	117us-gaap_OtherNoncashIncomeExpense	1,283us-gaap_OtherNoncashIncomeExpense
Changes in working capital items:
Trade and other receivables (change)	2,115	(3,827)	(6,208)
Inventories (change)	(10,399)us-gaap_IncreaseDecreaseInInventories	2,488us-gaap_IncreaseDecreaseInInventories	1,457us-gaap_IncreaseDecreaseInInventories
Unbilled revenues (change)	720	(3,720)	(2,508)
Prepaid taxes (change)	(19,804)us-gaap_IncreaseDecreaseInPrepaidTaxes	414us-gaap_IncreaseDecreaseInPrepaidTaxes	2,731us-gaap_IncreaseDecreaseInPrepaidTaxes
Other current assets (change)	(5,693)	2,514	4,093
Accounts payable (change)	2,756	858	(272)
Other current liabilities (change)	(4,195)	6,271	425
Dividend income from ATC	7,740	7,404	7,146
Cash contributions to pension and other postretirement plans	(3,321)	(34,765)	(28,857)
Debt make-whole premium	0	(6,757)	0
Other noncurrent items, net	(4,452)	10,845	6,992
Cash Provided by (Used for) Operating Activities	128,762	140,267	146,004
Investing Activities:
Capital expenditures	(92,676)	(119,047)	(98,435)
Capital contributions to investments	(2,185)	(1,660)	(2,419)
Purchase of investment - land	0	(10)	(3)
Other investing	(1,297)	(1,205)	(496)
Cash Provided by (Used for) Investing Activities	(96,158)	(121,922)	(101,353)
Financing Activities:
Cash dividends paid on common stock	(38,429)us-gaap_PaymentsOfDividendsCommonStock	(37,107)us-gaap_PaymentsOfDividendsCommonStock	(35,951)us-gaap_PaymentsOfDividendsCommonStock
Repayment of long-term debt	(4,103)us-gaap_RepaymentsOfLongTermDebt	(43,012)us-gaap_RepaymentsOfLongTermDebt	(30,668)us-gaap_RepaymentsOfLongTermDebt
Issuance of long-term debt	0	85,000	28,000
Increase in short-term debt	7,000	0	0
Other financing	(130)	(770)	(844)
Cash Provided by (Used for) Financing Activities	(35,662)	4,111	(39,463)
Change in Cash and Cash Equivalents:	(3,058)	22,456	5,188
Cash and cash equivalents at beginning of period	68,813	46,357	41,169
Cash and cash equivalents at end of period	65,755	68,813	46,357
Supplemental disclosures of cash flow information:
Interest paid	20,478us-gaap_InterestPaid	17,991us-gaap_InterestPaid	19,499us-gaap_InterestPaid
Income taxes paid	19,579us-gaap_IncomeTaxesPaid	8,046us-gaap_IncomeTaxesPaid	3,544us-gaap_IncomeTaxesPaid
Income taxes received	(644)us-gaap_ProceedsFromIncomeTaxRefunds	(1,339)us-gaap_ProceedsFromIncomeTaxRefunds	(12,536)us-gaap_ProceedsFromIncomeTaxRefunds
Significant noncash investing activities:
Accrued capital expenditures	$ 1,569	$ 9,892	$ 10,317

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

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The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

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- Definition

The amount of cash received during the period as refunds for the overpayment of taxes.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

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-Section 45

-Paragraph 25

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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-Paragraph 9

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The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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- Definition

Amount of operating expense for depreciation and amortization of regulated operation.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(b))

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