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MGE Energy Inc Consolidated Statements of Common Equity (Unaudited) (USD $) In Thousands, except Share data | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive (Loss)/ Income [Member]
--- | --- | --- | --- | --- | ---
Beginning balance, value at Dec. 31, 2011 |  | $ 550,952 | $ 23,114 | $ 316,268 | $ 211,458 | $ 112
Beginning balance, shares at Dec. 31, 2011 |  |  | 23,114,000 |  |  |
Net Income |  | 16,048 |  |  | 16,048 |
Other comprehensive income (loss) |  | 7 |  |  |  | 7
Common stock dividends declared | [1] | (8,843) |  |  | (8,843) |
Common stock issued during period |  | 0 |  |  |  |
Ending balance, value at Mar. 31, 2012 |  | 558,164 | 23,114 | 316,268 | 218,663 | 119
Ending balance, shares at Mar. 31, 2012 |  |  | 23,114,000 |  |  |
Beginning balance, value at Dec. 31, 2012 |  | 579,429 | 23,114 | 316,268 | 239,953 | 94
Beginning balance, shares at Dec. 31, 2012 |  |  | 23,114,000 |  |  |
Net Income |  | 22,584 |  |  | 22,584 |
Other comprehensive income (loss) |  | 65 |  |  |  | 65
Common stock dividends declared | [2] | (9,132) |  |  | (9,132) |
Common stock issued during period |  | 0 |  |  |  |
Ending balance, value at Mar. 31, 2013 |  | $ 592,946 | $ 23,114 | $ 316,268 | $ 253,405 | $ 159
Ending balance, shares at Mar. 31, 2013 |  |  | 23,114,000 |  |  |
[1] | $0.383 per share
[2] | $0.395 per share

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