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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Reclassification out of Accumulated Other Comprehensive Income | Information regarding AOCI is as follows:
| Accumulated Other Comprehensive Income (Loss)
| PNM |  |  |  | PNMR
| Unrealized Gains on Available-for-Sale Securities |  | Pension Liability Adjustment |  | Total |  |  |  | Fair Value Adjustment for Cash Flow Hedges |  | Total
| (In thousands)
Balance at December 31, 2020 | $ | 20,403 |  |  | $ | (98,914) |  |  | $ | (78,511) |  |  |  |  | $ | (672) |  |  | $ | (79,183) |
Amounts reclassified from AOCI (pre-tax) | (9,765) |  |  | 8,348 |  |  | (1,417) |  |  |  |  | (903) |  |  | (2,320) |
Income tax impact of amounts reclassified | 2,480 |  |  | (2,120) |  |  | 360 |  |  |  |  | 229 |  |  | 589 |
Other OCI changes (pre-tax) | (1,881) |  |  | 12,111 |  |  | 10,230 |  |  |  |  | 1,804 |  |  | 12,034 |
Income tax impact of other OCI changes | 478 |  |  | (3,076) |  |  | (2,598) |  |  |  |  | (458) |  |  | (3,056) |
Net after-tax change | (8,688) |  |  | 15,263 |  |  | 6,575 |  |  |  |  | 672 |  |  | 7,247 |
Balance at December 31, 2021 | 11,715 |  |  | (83,651) |  |  | (71,936) |  |  |  |  | — |  |  | (71,936) |
Amounts reclassified from AOCI (pre-tax) | (3,827) |  |  | 7,104 |  |  | 3,277 |  |  |  |  | (1,176) |  |  | 2,101 |
Income tax impact of amounts reclassified | 972 |  |  | (1,804) |  |  | (832) |  |  |  |  | 299 |  |  | (533) |
Other OCI changes (pre-tax) | (1,928) |  |  | (4,565) |  |  | (6,493) |  |  |  |  | 12,285 |  |  | 5,792 |
Income tax impact of other OCI changes | 490 |  |  | 1,159 |  |  | 1,649 |  |  |  |  | (3,121) |  |  | (1,472) |
Net after-tax change | (4,293) |  |  | 1,894 |  |  | (2,399) |  |  |  |  | 8,287 |  |  | 5,888 |
Balance at December 31, 2022 | 7,422 |  |  | (81,757) |  |  | (74,335) |  |  |  |  | 8,287 |  |  | (66,048) |
Amounts reclassified from AOCI (pre-tax) | (7,199) |  |  | 4,776 |  |  | (2,423) |  |  |  |  | 9,287 |  |  | 6,864 |
Income tax impact of amounts reclassified | 1,828 |  |  | (1,212) |  |  | 616 |  |  |  |  | (2,359) |  |  | (1,743) |
Other OCI changes (pre-tax) | 11,529 |  |  | 1,389 |  |  | 12,918 |  |  |  |  | (15,483) |  |  | (2,565) |
Income tax impact of other OCI changes | (2,928) |  |  | (353) |  |  | (3,281) |  |  |  |  | 3,933 |  |  | 652 |
Net after-tax change | 3,230 |  |  | 4,600 |  |  | 7,830 |  |  |  |  | (4,622) |  |  | 3,208 |
Balance at December 31, 2023 | $ | 10,652 |  |  | $ | (77,157) |  |  | $ | (66,505) |  |  |  |  | $ | 3,665 |  |  | $ | (62,840) |
The following table presents pre-tax information about net actuarial (gain) loss in AOCI as of December 31, 2023.
|  |  | PNM |  | TNMP
|  |  | (In thousands)
Amounts in AOCI not yet recognized in net periodic benefit cost (income) at beginning of year |  |  | $ | 110,345 |  |  | $ | — |
Experience (gain) loss |  |  | (6,193) |  |  | 1,005 |
Regulatory asset (liability) adjustment |  |  | 4,629 |  |  | (1,005) |
Amortization recognized in net periodic benefit (income) |  |  | (4,713) |  |  | — |
Amounts in AOCI not yet recognized in net periodic benefit cost at end of year |  |  | $ | 104,068 |  |  | $ | — |
The following table presents pre-tax information about net actuarial loss in AOCI as of December 31, 2023.
| December 31, 2023
| PNM |  | TNMP
| (In thousands)
Amount in AOCI not yet recognized in net periodic benefit cost at beginning of year | $ | 995 |  |  | $ | — |
Experience (gain) | 411 |  |  | 13 |
Regulatory asset adjustment | (238) |  |  | (13) |
Amortization recognized in net periodic benefit (income) | (64) |  |  | — |
Amount in AOCI not yet recognized in net periodic benefit cost at end of year | $ | 1,104 |  |  | $ | — |

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