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Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2024
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Information regarding accumulated other comprehensive income (loss) for the six months ended June 30, 2024 and 2023 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, 2023 | $ | 10,652 |  |  | $ | (77,157) |  |  | $ | (66,505) |  |  |  |  | $ | 3,665 |  |  | $ | (62,840) |
Amounts reclassified from AOCI (pre-tax) | (12,566) |  |  | 2,433 |  |  | (10,133) |  |  |  |  | 5,563 |  |  | (4,570) |
Income tax impact of amounts reclassified | 3,192 |  |  | (618) |  |  | 2,574 |  |  |  |  | (1,413) |  |  | 1,161 |
Other OCI changes (pre-tax) | (587) |  |  | — |  |  | (587) |  |  |  |  | (4,307) |  |  | (4,894) |
Income tax impact of other OCI changes | 149 |  |  | — |  |  | 149 |  |  |  |  | 1,094 |  |  | 1,243 |
Net after-tax change | (9,812) |  |  | 1,815 |  |  | (7,997) |  |  |  |  | 937 |  |  | (7,060) |
Balance at June 30, 2024 | $ | 840 |  |  | $ | (75,342) |  |  | $ | (74,502) |  |  |  |  | $ | 4,602 |  |  | $ | (69,900) |
Balance at December 31, 2022 | $ | 7,422 |  |  | $ | (81,757) |  |  | $ | (74,335) |  |  |  |  | $ | 8,287 |  |  | $ | (66,048) |
Amounts reclassified from AOCI (pre-tax) | (2,580) |  |  | 2,388 |  |  | (192) |  |  |  |  | 1,197 |  |  | 1,005 |
Income tax impact of amounts reclassified | 655 |  |  | (606) |  |  | 49 |  |  |  |  | (304) |  |  | (255) |
Other OCI changes (pre-tax) | 4,560 |  |  | — |  |  | 4,560 |  |  |  |  | 3,567 |  |  | 8,127 |
Income tax impact of other OCI changes | (1,158) |  |  | — |  |  | (1,158) |  |  |  |  | (906) |  |  | (2,064) |
Net after-tax change | 1,477 |  |  | 1,782 |  |  | 3,259 |  |  |  |  | 3,554 |  |  | 6,813 |
Balance at June 30, 2023 | $ | 8,899 |  |  | $ | (79,975) |  |  | $ | (71,076) |  |  |  |  | $ | 11,841 |  |  | $ | (59,235) |

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