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Earnings Per Share | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share In accordance with GAAP, dual presentation of basic and diluted earnings (loss) per share has been presented in the Consolidated Statements of Earnings (Loss) of PNMR. Information regarding the computation of earnings (loss) per share is as follows:
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
| (In thousands, except per share amounts)
Earnings (Loss) Attributable to PNMR: |  |  |  |  |
Earnings (loss) | $ | 120,125 |  |  | $ | 190,934 |  |  | $ | (31,124 | )
Earnings attributable to Valencia Non-controlling Interest | (14,050 | ) |  | (14,047 | ) |  | (13,563 | )
Preferred stock dividend requirements of subsidiary | (528 | ) |  | (528 | ) |  | (528 | )
Net Earnings (Loss) Attributable to PNMR | $ | 105,547 |  |  | $ | 176,359 |  |  | $ | (45,215 | )
Average Number of Common Shares: |  |  |  |  |
Outstanding during year | 79,654 |  |  | 85,558 |  |  | 86,673 |
Equivalents from convertible preferred stock (Note 5) | — |  |  | 3,469 |  |  | 4,778 |
Vested awards of restricted stock | 145 |  |  | 174 |  |  | 106 |
Average Shares - Basic | 79,799 |  |  | 89,201 |  |  | 91,557 |
Dilutive Effect of Common Stock Equivalents (1): |  |  |  |  |
Stock options and restricted stock | 618 |  |  | 556 |  |  | — |
Average Shares – Diluted | 80,417 |  |  | 89,757 |  |  | 91,557 |
Net Earnings (Loss) Per Share of Common Stock: |  |  |  |  |
Basic | $ | 1.32 |  |  | $ | 1.98 |  |  | $ | (0.49 | )
Diluted | 1.31 |  |  | 1.96 |  |  | (0.49 | )
(1) | Excludes out-of-the-money options for 1,214,365 shares of common stock at December 31, 2012. Due to losses in the year ended December 31, 2010, no potentially dilutive securities are reflected in the average number of common shares used to compute earnings (loss) per share since any impact would be anti-dilutive. See Note 13.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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