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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2012
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | Information regarding the computation of earnings per share is as follows:
| Three Months Ended
| March 31,
| 2012 |  | 2011
| (In thousands, except per share amounts)
Net Earnings Attributable to PNMR | $ | 17,080 |  |  | $ | 16,637 |
Average Number of Common Shares: |  |  |
Outstanding during period | 79,654 |  |  | 86,673 |
Equivalents from convertible preferred stock (Note 7) | — |  |  | 4,778 |
Vested awards of restricted stock | 200 |  |  | 182 |
Average Shares - Basic | 79,854 |  |  | 91,633 |
Dilutive Effect of Common Stock Equivalents (1): |  |  |
Stock options and restricted stock | 621 |  |  | 475 |
Average Shares - Diluted | 80,475 |  |  | 92,108 |
Net Earnings Per Share of Common Stock: |  |  |
Basic | $ | 0.21 |  |  | $ | 0.18 |
Diluted | $ | 0.21 |  |  | $ | 0.18 |
(1) | Excludes the effect of out-of-the-money options for 1,360,568 shares of common stock at March 31, 2012.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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