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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Earnings Per Share [Abstract] |  |
Net Earnings Attributable to PNMR | $ 55,014 | $ 15,991
Average Number of Common Shares: |  |
Outstanding during period (in shares) | 85,835 | 85,835
Vested awards of restricted stock (in shares) | 266 | 256
Average Shares – Basic (in shares) | 86,101 | 86,091
Dilutive Effect of Common Stock Equivalents: |  |
Restricted stock (in shares) | 37 | 80
PNMR 2020 Forward Equity Sale Agreements (in shares) | 3 | 0
Average Shares – Diluted (in shares) | 86,141 | 86,171
Net Earnings Per Share of Common Stock: |  |
Basic (in dollars per share) | $ 0.64 | $ 0.19
Diluted (in dollars per share) | $ 0.64 | $ 0.19

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