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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2022
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Information regarding accumulated other comprehensive income (loss) for the nine months ended September 30, 2022 and 2021 is as follows:
| Accumulated Other Comprehensive Income (Loss)
| PNM |  |  |  | Corporate and Other |  | PNMR Consolidated
| Unrealized Gains on Available-for-Sale Debt Securities |  | Pension Liability Adjustment |  |  |  |  |  | Fair Value Adjustment for Cash Flow Hedges |  |
|  |  | Total |  |  |  |  | Total
| (In thousands)
Balance at December 31, 2021 | $ | 11,715 |  |  | $ | (83,651) |  |  | $ | (71,936) |  |  |  |  | $ | — |  |  | $ | (71,936) |
Amounts reclassified from AOCI (pre-tax) | (3,426) |  |  | 5,328 |  |  | 1,902 |  |  |  |  | (1,767) |  |  | 135 |
Income tax impact of amounts reclassified | 870 |  |  | (1,353) |  |  | (483) |  |  |  |  | 449 |  |  | (34) |
Other OCI changes (pre-tax) | (8,170) |  |  | — |  |  | (8,170) |  |  |  |  | 10,391 |  |  | 2,221 |
Income tax impact of other OCI changes | 2,075 |  |  | — |  |  | 2,075 |  |  |  |  | (2,640) |  |  | (565) |
Net after-tax change | (8,651) |  |  | 3,975 |  |  | (4,676) |  |  |  |  | 6,433 |  |  | 1,757 |
Balance at September 30, 2022 | $ | 3,064 |  |  | $ | (79,676) |  |  | $ | (76,612) |  |  |  |  | $ | 6,433 |  |  | $ | (70,179) |
Balance at December 31, 2020 | $ | 20,403 |  |  | $ | (98,914) |  |  | $ | (78,511) |  |  |  |  | $ | (672) |  |  | $ | (79,183) |
Amounts reclassified from AOCI (pre-tax) | (8,120) |  |  | 6,261 |  |  | (1,859) |  |  |  |  | (903) |  |  | (2,762) |
Income tax impact of amounts reclassified | 2,062 |  |  | (1,590) |  |  | 472 |  |  |  |  | 229 |  |  | 701 |
Other OCI changes (pre-tax) | (968) |  |  | — |  |  | (968) |  |  |  |  | 1,804 |  |  | 836 |
Income tax impact of other OCI changes | 246 |  |  | — |  |  | 246 |  |  |  |  | (458) |  |  | (212) |
Net after-tax change | (6,780) |  |  | 4,671 |  |  | (2,109) |  |  |  |  | 672 |  |  | (1,437) |
Balance at September 30, 2021 | $ | 13,623 |  |  | $ | (94,243) |  |  | $ | (80,620) |  |  |  |  | $ | — |  |  | $ | (80,620) |

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