Madison Gas and Electric Company Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Items not affecting cash:
Depreciation and amortization	$ 38,838	$ 38,707	$ 40,942
Deferred income taxes	38,365	44,797	33,698
Provision for doubtful receivables	2,448	2,498	2,312
Employee benefit plan expenses	13,303	18,353	13,703
Equity earnings in ATC	(9,434)	(9,079)	(8,615)
Other items	117	1,283	1,616
Changes in working capital items:
Receivable - margin account (change)	1,444	3,726	(2,609)
Trade and other receivables (change)	(3,827)	(6,208)	173
Inventories (change)	2,488	1,457	7,438
Unbilled revenues (change)	(3,720)	(2,508)	3,466
Prepaid taxes (change)	414	2,731	245
Other current assets (change)	1,070	367	538
Accounts payable (change)	858	(272)	2,055
Other current liabilities (change)	6,271	425	(4,300)
Dividend income from ATC	7,404	7,146	6,728
Cash contributions to pension and other postretirement plans	(34,765)	(28,857)	(23,670)
Debt make-whole premium	(6,757)	0	0
Other noncurrent items, net	10,845	6,992	(3,876)
Cash Provided by (Used for) Operating Activities	140,267	146,004	130,772
Investing Activities:
Capital expenditures	(119,047)	(98,435)	(65,176)
Capital contributions to investments	(1,660)	(2,419)	(1,008)
Other investing	(1,205)	(496)	1,985
Cash Provided by (Used for) Investing Activities	(121,922)	(101,353)	(66,351)
Financing Activities:
Repayment of long-term debt	(43,012)	(30,668)	(2,500)
Issuance of long-term debt	85,000	28,000	30,000
Decrease in short-term debt	0	0	(22,500)
Other financing	(770)	(844)	(336)
Cash Provided by (Used for) Financing Activities	4,111	(39,463)	(30,362)
Change in Cash and Cash Equivalents:	22,456	5,188	34,059
Cash and cash equivalents at beginning of period	46,357	41,169	7,110
Cash and cash equivalents at end of period	68,813	46,357	41,169
Supplemental disclosures of cash flow information:
Interest paid	17,991	19,499	19,788
Income taxes paid	8,046	3,544	5,537
Income taxes received	(1,339)	(12,536)	(4,370)
Significant noncash investing activities:
Accrued capital expenditures	9,892	10,317	684
MGE [Member]
Operating Activities:
Net Income	76,445	65,306	61,252
Items not affecting cash:
Depreciation and amortization	38,834	38,707	40,942
Deferred income taxes	37,462	44,112	32,773
Provision for doubtful receivables	2,448	2,498	2,312
Employee benefit plan expenses	13,303	18,353	13,703
Equity earnings in ATC	(9,434)	(9,079)	(8,615)
Other items	651	1,813	2,172
Changes in working capital items:
Receivable - margin account (change)	1,444	3,726	(2,609)
Trade and other receivables (change)	(3,699)	(7,219)	1,183
Inventories (change)	2,488	1,457	7,438
Unbilled revenues (change)	(3,720)	(2,508)	3,466
Prepaid taxes (change)	(373)	(1,584)	(477)
Other current assets (change)	1,074	366	536
Accounts payable (change)	126	(1,658)	4,214
Accrued interest and taxes (change)	2,065	211	(3,741)
Other current liabilities (change)	2,975	(714)	(4,027)
Dividend income from ATC	7,404	7,146	6,728
Cash contributions to pension and other postretirement plans	(34,765)	(28,857)	(23,670)
Debt make-whole premium	(6,757)	0	0
Other noncurrent items, net	10,713	6,696	(3,897)
Cash Provided by (Used for) Operating Activities	138,684	138,772	129,683
Investing Activities:
Capital expenditures	(119,047)	(98,435)	(65,176)
Capital contributions to investments	(1,420)	(2,140)	(888)
Other investing	(130)	(508)	342
Cash Provided by (Used for) Investing Activities	(120,597)	(101,083)	(65,722)
Financing Activities:
Cash dividends paid to parent by MGE	(25,000)	(20,404)	(26,648)
Distributions to parent from noncontrolling interest	(27,365)	(23,500)	(52,500)
Equity contribution received by noncontrolling interest	1,420	2,130	888
Repayment of long-term debt	(43,012)	(30,668)	(2,500)
Issuance of long-term debt	85,000	28,000	30,000
Decrease in short-term debt	0	0	(3,500)
Other financing	(672)	(795)	(297)
Cash Provided by (Used for) Financing Activities	(9,629)	(45,237)	(54,557)
Change in Cash and Cash Equivalents:	8,458	(7,548)	9,404
Cash and cash equivalents at beginning of period	6,350	13,898	4,494
Cash and cash equivalents at end of period	14,808	6,350	13,898
Supplemental disclosures of cash flow information:
Interest paid	17,991	19,499	19,731
Income taxes paid	144	44	28
Income taxes received	0	(448)	(10)
Significant noncash investing activities:
Accrued capital expenditures	$ 9,892	$ 10,317	$ 684