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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Earnings Per Share [Abstract] |  |  |  |
Net Earnings Attributable to PNMR | $ 122,433 | $ 113,321 | $ 153,785 | $ 184,609
Average Number of Common Shares: |  |  |  |
Outstanding during period (in shares) | 85,835 | 85,835 | 85,835 | 85,835
Vested awards of restricted stock (in shares) | 266 | 237 | 291 | 230
Average Shares – Basic (in shares) | 86,101 | 86,072 | 86,126 | 86,065
Dilutive Effect of Common Stock Equivalents: |  |  |  |
Restricted stock (in shares) | 35 | 41 | 52 | 41
Average Shares – Diluted (in shares) | 86,136 | 86,113 | 86,178 | 86,106
Net Earnings Per Share of Common Stock: |  |  |  |
Basic (in dollars per share) | $ 1.42 | $ 1.32 | $ 1.79 | $ 2.14
Diluted (in dollars per share) | $ 1.42 | $ 1.32 | $ 1.78 | $ 2.14

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