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Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2022
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Information regarding accumulated other comprehensive income (loss) for the six months ended June 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) | (2,917) |  |  | 3,552 |  |  | 635 |  |  |  |  | (1,185) |  |  | (550) |
Income tax impact of amounts reclassified | 741 |  |  | (902) |  |  | (161) |  |  |  |  | 301 |  |  | 140 |
Other OCI changes (pre-tax) | (9,452) |  |  | — |  |  | (9,452) |  |  |  |  | 3,448 |  |  | (6,004) |
Income tax impact of other OCI changes | 2,401 |  |  | — |  |  | 2,401 |  |  |  |  | (876) |  |  | 1,525 |
Net after-tax change | (9,227) |  |  | 2,650 |  |  | (6,577) |  |  |  |  | 1,688 |  |  | (4,889) |
Balance at June 30, 2022 | $ | 2,488 |  |  | $ | (81,001) |  |  | $ | (78,513) |  |  |  |  | $ | 1,688 |  |  | $ | (76,825) |
Balance at December 31, 2020 | $ | 20,403 |  |  | $ | (98,914) |  |  | $ | (78,511) |  |  |  |  | $ | (672) |  |  | $ | (79,183) |
Amounts reclassified from AOCI (pre-tax) | (5,632) |  |  | 4,174 |  |  | (1,458) |  |  |  |  | (903) |  |  | (2,361) |
Income tax impact of amounts reclassified | 1,430 |  |  | (1,060) |  |  | 370 |  |  |  |  | 229 |  |  | 599 |
Other OCI changes (pre-tax) | 329 |  |  | — |  |  | 329 |  |  |  |  | 1,804 |  |  | 2,133 |
Income tax impact of other OCI changes | (83) |  |  | — |  |  | (83) |  |  |  |  | (458) |  |  | (541) |
Net after-tax change | (3,956) |  |  | 3,114 |  |  | (842) |  |  |  |  | 672 |  |  | (170) |
Balance at June 30, 2021 | $ | 16,447 |  |  | $ | (95,800) |  |  | $ | (79,353) |  |  |  |  | $ | — |  |  | $ | (79,353) |

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