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Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified | Total | Preferred Stock, Series A [Member] | Common Stock [Member] | AOCI [Member] | Retained Earnings [Member] | Total PNMR 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 PNMR 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, 2010 | $ 1,721,919 | $ 100,000 | $ 1,290,465 | $ (68,666) | $ 314,943 | $ 1,536,742 | $ 85,177 | $ 1,208,526 | $ 1,018,776 | $ (66,786) | $ 171,359 | $ 1,123,349 | $ 85,177 |  |  |  |  |
Balance TNMP at Dec. 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  | 453,283 | 64 | 430,108 | (1,485) | 24,596
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercises | 5,622 | 0 | 5,622 | 0 | 0 | 5,622 | 0 |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 176,359 |  |  |  |  |  |  | 54,491 |  |  |  |  |  | 22,257 | 0 | 0 | 0 | 22,257
Purchases to satisfy awards of common stock | (10,104) | 0 | (10,104) | 0 | 0 | (10,104) | 0 |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 6,556 | 0 | 6,556 | 0 | 0 | 6,556 | 0 |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (16,801) | 0 | 0 | 0 | 0 | 0 | (16,801) | (16,801) | 0 | 0 | 0 | 0 | (16,801) |  |  |  |  |
Purchase of preferred stock | (73,510) | (100,000) | 26,490 | 0 | 0 | 26,490 | 0 |  |  |  |  |  |  |  |  |  |  |
Purchase of common stock | (125,838) | 0 | (125,838) | 0 | 0 | (125,838) | 0 |  |  |  |  |  |  |  |  |  |  |
Net earnings | 190,934 | 0 | 0 | 0 | 176,887 | 176,887 | 14,047 | 68,538 | 0 | 0 | 54,491 | 54,491 | 14,047 |  |  |  |  |
Subsidiary preferred stock dividends | (528) | 0 | 0 | 0 | (528) | (528) | 0 |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive income | 1,810 | 0 | 0 | 1,810 | 0 | 1,810 | 0 | (12) | 0 | (12) | 0 | (12) | 0 | 1,427 | 0 | 0 | 1,427 | 0
Equity contributions from parent |  |  |  |  |  |  |  | 43,000 | 43,000 | 0 | 0 | 43,000 | 0 |  |  |  |  |
Dividends declared on preferred stock |  |  |  |  |  |  |  | (528) | 0 | 0 | (528) | (528) | 0 |  |  |  |  |
Dividends declared on common stock | (43,652) | 0 | 0 | 0 | (43,652) | (43,652) | 0 | (8,211) | 0 | 0 | (8,211) | (8,211) | 0 | (13,714) | 0 | (13,714) | 0 | 0
Balance TNMP at Dec. 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  | 463,253 | 64 | 416,394 | (58) | 46,853
Balance at Dec. 31, 2011 | 1,656,408 | 0 | 1,193,191 | (66,856) | 447,650 | 1,573,985 | 82,423 | 1,294,512 | 1,061,776 | (66,798) | 217,111 | 1,212,089 | 82,423 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 17,080 |  |  |  |  |  |  | 17,812 |  |  |  |  |  | 3,011 |  |  |  |
Net earnings | 20,477 |  |  |  |  |  |  | 21,077 |  |  |  |  |  |  |  |  |  |
Balance TNMP at Mar. 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2011 | 1,656,408 | 0 | 1,193,191 | (66,856) | 447,650 | 1,573,985 | 82,423 | 1,294,512 | 1,061,776 | (66,798) | 217,111 | 1,212,089 | 82,423 |  |  |  |  |
Balance TNMP at Dec. 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  | 463,253 | 64 | 416,394 | (58) | 46,853
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercises | 11,684 | 0 | 11,684 | 0 | 0 | 11,684 | 0 |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 105,547 |  |  |  |  |  |  | 91,551 |  |  |  |  |  | 26,747 | 0 | 0 | 0 | 26,747
Purchases to satisfy awards of common stock | (25,168) | 0 | (25,168) | 0 | 0 | (25,168) | 0 |  |  |  |  |  |  |  |  |  |  |
Excess tax (shortfall) from stock-based payment arrangements | (473) | 0 | (473) | 0 | 0 | (473) | 0 |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 3,585 | 0 | 3,585 | 0 | 0 | 3,585 | 0 |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (15,630) | 0 | 0 | 0 | 0 | 0 | (15,630) | (15,630) | 0 | 0 | 0 | 0 | (15,630) |  |  |  |  |
Net earnings | 120,125 | 0 | 0 | 0 | 106,075 | 106,075 | 14,050 | 105,601 | 0 | 0 | 91,551 | 91,551 | 14,050 |  |  |  |  |
Subsidiary preferred stock dividends | (528) | 0 | 0 | 0 | (528) | (528) | 0 |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive income | (14,774) | 0 | 0 | (14,774) | 0 | (14,774) | 0 | (14,616) | 0 | (14,616) | 0 | (14,616) | 0 | (158) | 0 | 0 | (158) | 0
Dividends declared on preferred stock |  |  |  |  |  |  |  | (528) | 0 | 0 | (528) | (528) | 0 |  |  |  |  |
Dividends declared on common stock | (46,199) | 0 | 0 | 0 | (46,199) | (46,199) | 0 | (34,433) | 0 | 0 | (34,433) | (34,433) | 0 | (26,028) | 0 | (26,028) | 0 | 0
Balance TNMP at Dec. 31, 2012 | 1,608,187 |  |  |  |  |  |  | 1,254,063 |  |  |  |  |  | 463,814 | 64 | 390,366 | (216) | 73,600
Balance at Dec. 31, 2012 | 1,689,030 | 0 | 1,182,819 | (81,630) | 506,998 | 1,608,187 | 80,843 | 1,334,906 | 1,061,776 | (81,414) | 273,701 | 1,254,063 | 80,843 |  |  |  |  |
Balance at Sep. 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 9,091 |  |  |  |  |  |  | 5,943 |  |  |  |  |  | 6,634 |  |  |  |
Net earnings | 12,573 |  |  |  |  |  |  | 9,293 |  |  |  |  |  |  |  |  |  |
Balance TNMP at Dec. 31, 2012 | 1,608,187 |  |  |  |  |  |  | 1,254,063 |  |  |  |  |  | 463,814 |  |  |  |
Balance at Dec. 31, 2012 | 1,689,030 |  |  |  |  |  |  | 1,334,906 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 10,626 |  |  |  |  |  |  | 11,569 |  |  |  |  |  | 3,726 |  |  |  |
Net earnings | 13,962 |  |  |  |  |  |  | 14,773 |  |  |  |  |  |  |  |  |  |
Balance TNMP at Mar. 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Dec. 31, 2012 | 1,689,030 | 0 | 1,182,819 | (81,630) | 506,998 | 1,608,187 | 80,843 | 1,334,906 | 1,061,776 | (81,414) | 273,701 | 1,254,063 | 80,843 |  |  |  |  |
Balance TNMP at Dec. 31, 2012 | 1,608,187 |  |  |  |  |  |  | 1,254,063 |  |  |  |  |  | 463,814 | 64 | 390,366 | (216) | 73,600
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercises | 4,618 | 0 | 4,618 | 0 | 0 | 4,618 | 0 |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 100,507 |  |  |  |  |  |  | 88,155 |  |  |  |  |  | 29,090 | 0 | 0 | 0 | 29,090
Purchases to satisfy awards of common stock | (13,807) | 0 | (13,807) | 0 | 0 | (13,807) | 0 |  |  |  |  |  |  |  |  |  |  |
Excess tax (shortfall) from stock-based payment arrangements | (581) | 0 | (581) | 0 | 0 | (581) | 0 |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | 5,320 | 0 | 5,320 | 0 | 0 | 5,320 | 0 |  |  |  |  |  |  |  |  |  |  |
Valencia’s transactions with its owner | (18,335) | 0 | 0 | 0 | 0 | 0 | (18,335) | (18,335) | 0 | 0 | 0 | 0 | (18,335) |  |  |  |  |
Net earnings | 115,556 | 0 | 0 | 0 | 101,035 | 101,035 | 14,521 | 102,676 | 0 | 0 | 88,155 | 88,155 | 14,521 |  |  |  |  |
Subsidiary preferred stock dividends | (528) | 0 | 0 | 0 | (528) | (528) | 0 |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive income | 23,490 | 0 | 0 | 23,490 | 0 | 23,490 | 0 | 23,537 | 0 | 23,537 | 0 | 23,537 | 0 | (47) | 0 | 0 | (47) | 0
Equity contributions from parent |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,800 | 0 | 13,800 | 0 | 0
Dividends declared on preferred stock |  |  |  |  |  |  |  | (528) | 0 | 0 | (528) | (528) | 0 |  |  |  |  |
Dividends declared on common stock | (54,165) | 0 | 0 | 0 | (54,165) | (54,165) | 0 | (155,028) | 0 | 0 | (155,028) | (155,028) | 0 | (3,726) | 0 | 0 | 0 | (3,726)
Balance TNMP at Dec. 31, 2013 | 1,673,569 |  |  |  |  |  |  | 1,210,199 |  |  |  |  |  | 502,931 | 64 | 404,166 | (263) | 98,964
Balance at Dec. 31, 2013 | 1,750,598 | 0 | 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 at Sep. 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) | 7,648 |  |  |  |  |  |  | 2,639 |  |  |  |  |  | 6,919 |  |  |  |
Net earnings | 11,397 |  |  |  |  |  |  | 6,256 |  |  |  |  |  |  |  |  |  |
Balance TNMP at Dec. 31, 2013 | 1,673,569 |  |  |  |  |  |  | 1,210,199 |  |  |  |  |  | 502,931 |  |  |  |
Balance at Dec. 31, 2013 | $ 1,750,598 |  |  |  |  |  |  | $ 1,287,228 |  |  |  |  |  |  |  |  |  |

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