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Condensed Consolidated Statements of Changes in Equity (USD $) In Thousands | Total | Public Service Company of New Mexico [Member] | Texas-New Mexico Power Company [Member] | Preferred Stock, Series A [Member] | Common Stock [Member] | Common Stock [Member] Public Service Company of New Mexico [Member] | Common Stock [Member] Texas-New Mexico Power Company [Member] | Additional Paid-in Capital [Member] Texas-New Mexico Power Company [Member] | AOCI [Member] | AOCI [Member] Public Service Company of New Mexico [Member] | AOCI [Member] Texas-New Mexico Power Company [Member] | Retained Earnings [Member] | Retained Earnings [Member] Public Service Company of New Mexico [Member] | Retained Earnings [Member] Texas-New Mexico Power Company [Member] | Total PNMR Common Stockholders' Equity [Member] | Total PNMR Common Stockholders' Equity [Member] Public Service Company of New Mexico [Member] | Non-controlling Interest in Valencia [Member] | Non-controlling Interest in Valencia [Member] Public Service Company of New Mexico [Member] | Common Stock [Member] | Common Stock [Member] Preferred Stock, Series A [Member] | Common Stock [Member] | Common Stock [Member] AOCI [Member] | Common Stock [Member] Retained Earnings [Member] | Common Stock [Member] Total PNMR Common Stockholders' Equity [Member] | Common Stock [Member] Non-controlling Interest in Valencia [Member] | Preferred Stock [Member] | Preferred Stock [Member] Preferred Stock, Series A [Member] | Preferred Stock [Member] Common Stock [Member] | Preferred Stock [Member] AOCI [Member] | Preferred Stock [Member] Retained Earnings [Member] | Preferred Stock [Member] Total PNMR Common Stockholders' Equity [Member] | Preferred Stock [Member] Non-controlling Interest in Valencia [Member]
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Balance at Dec. 31, 2010 | $ 1,721,919 | $ 1,208,526 |  | $ 100,000 | $ 1,290,465 | $ 1,018,776 |  |  | $ (68,666) | $ (66,786) |  | $ 314,943 | $ 171,359 |  | $ 1,536,742 | $ 1,123,349 | $ 85,177 | $ 85,177 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance TNMP at Dec. 31, 2010 | 1,536,742 | 1,123,349 | 453,283 |  |  |  | 64 | 430,108 |  |  | (1,485) |  |  | 24,596 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock option exercise | 2,570 |  |  | 0 | 2,570 |  |  |  | 0 |  |  | 0 |  |  | 2,570 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases to satisfy awards of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,288) | 0 | (5,288) | 0 | 0 | (5,288) | 0 | (73,510) | (100,000) | 26,490 | 0 | 0 | 26,490 | 0
Stock based compensation expense | 4,302 |  |  | 0 | 4,302 |  |  |  | 0 |  |  | 0 |  |  | 4,302 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valencia's transactions with its owner | (11,972) | (11,972) |  | 0 | 0 | 0 |  |  | 0 | 0 |  | 0 | 0 |  | 0 | 0 | (11,972) | (11,972) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings before subsidiary preferred stock dividends | 75,526 | 51,634 | 17,134 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 64,762 | 40,870 | 17,134 | 64,762 | 40,870 | 10,764 | 10,764 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary preferred stock dividends | (396) |  |  | 0 | 0 |  |  |  | 0 |  |  | (396) |  |  | (396) |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive income (loss) | (4,247) | (5,180) | 906 | 0 | 0 | 0 | 0 | 0 | (4,247) | (5,180) | 906 | 0 | 0 | 0 | (4,247) | (5,180) | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on preferred stock |  | (396) |  |  |  | 0 |  |  |  | 0 |  |  | (396) |  |  | (396) |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared on common stock | (33,695) | (8,212) | (7,066) | 0 | 0 | 0 | 0 | (7,066) | 0 | 0 | 0 | (33,695) | (8,212) | 0 | (33,695) | (8,212) | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance TNMP at Sep. 30, 2011 | 1,591,240 | 1,150,431 | 464,257 |  |  |  | 64 | 423,042 |  |  | (579) |  |  | 41,730 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2011 | 1,675,209 | 1,234,400 |  | 0 | 1,318,539 | 1,018,776 |  |  | (72,913) | (71,966) |  | 345,614 | 203,621 |  | 1,591,240 | 1,150,431 | 83,969 | 83,969 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Jun. 30, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings before subsidiary preferred stock dividends | 47,905 | 42,572 | 8,868 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary preferred stock dividends | (132) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total other comprehensive income (loss) | (2,222) | (3,498) | 1,339 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance TNMP at Sep. 30, 2011 | 1,591,240 | 1,150,431 | 464,257 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2011 | $ 1,675,209 | $ 1,234,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=6922042&loc=SL4591551-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=6921930&loc=SL4573702-111684 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=6922042&loc=SL4591552-111686 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4569616-111683 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=6228006&loc=d3e74512-122707 + Details
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