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Condensed Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified | Total | Common Stock [Member] | AOCI [Member] | Retained Earnings [Member] | Total Company Common Stockholders' Equity [Member] | Non-controlling Interest in Valencia [Member] | Public Service Company of New Mexico [Member] | Public Service Company of New Mexico [Member] Common Stock [Member] | Public Service Company of New Mexico [Member] AOCI [Member] | Public Service Company of New Mexico [Member] Retained Earnings [Member] | Public Service Company of New Mexico [Member] Total Company Common Stockholders' Equity [Member] | Public Service Company of New Mexico [Member] Non-controlling Interest in Valencia [Member] | Texas-New Mexico Power Company [Member] | Texas-New Mexico Power Company [Member] Common Stock [Member] | Texas-New Mexico Power Company [Member] Additional Paid-in Capital [Member] | Texas-New Mexico Power Company [Member] AOCI [Member] | Texas-New Mexico Power Company [Member] Retained Earnings [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2013 | $ 1,750,598 | $ 1,178,369 | $ (58,140) | $ 553,340 | $ 1,673,569 | $ 77,029 | $ 1,287,228 | $ 1,061,776 | $ (57,877) | $ 206,300 | $ 1,210,199 | $ 77,029 |  |  |  |  |
Balance TNMP at Dec. 31, 2013 | 1,673,569 |  |  |  |  |  | 1,210,199 |  |  |  |  |  | 502,931 | 64 | 404,166 | (263) | 98,964
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercise | 3,258 | 3,258 | 0 | 0 | 3,258 | 0 |  |  |  |  |  |  |  |  |  |  |
Awards of common stock | (11,639) | (11,639) | 0 | 0 | (11,639) | 0 |  |  |  |  |  |  |  |  |  |  |
Excess tax (shortfall) from stock-based payment arrangements | (21) | (21) | 0 | 0 | (21) | 0 |  |  |  |  |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | 2,131 | 2,131 | 0 | 0 | 2,131 | 0 |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (4,369) | 0 | 0 | 0 | 0 | (4,369) | (4,369) | 0 | 0 | 0 | 0 | (4,369) |  |  |  |  |
Net earnings | 12,468 |  |  |  |  |  | 7,674 |  |  |  |  |  | 6,803 | 0 | 0 | 0 | 6,803
Net earnings before subsidiary preferred stock dividends | 16,131 | 0 | 0 | 12,600 | 12,600 | 3,531 | 11,205 | 0 | 0 | 7,674 | 7,674 | 3,531 |  |  |  |  |
Subsidiary preferred stock dividends | (132) | 0 | 0 | (132) | (132) | 0 |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive income (loss) | 791 | 0 | 791 | 0 | 791 | 0 | 855 | 0 | 855 | 0 | 855 | 0 | (64) | 0 | 0 | (64) | 0
Dividends declared on preferred stock |  |  |  |  |  |  | (132) | 0 | 0 | (132) | (132) | 0 |  |  |  |  |
Dividends declared on common stock | (14,736) | 0 | 0 | (14,736) | (14,736) | 0 |  |  |  |  |  |  |  |  |  |  |
Balance TNMP at Mar. 31, 2014 | 1,665,821 |  |  |  |  |  | 1,218,596 |  |  |  |  |  | 509,670 | 64 | 404,166 | (327) | 105,767
Balance at Mar. 31, 2014 | $ 1,742,012 | $ 1,172,098 | $ (57,349) | $ 551,072 | $ 1,665,821 | $ 76,191 | $ 1,294,787 | $ 1,061,776 | $ (57,022) | $ 213,842 | $ 1,218,596 | $ 76,191 |  |  |  |  |

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