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Regulatory Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2023
Regulated Operations [Abstract] |
Schedule of Regulatory Assets and Liabilities | Regulatory assets and liabilities reflected in the Consolidated Balance Sheets are presented below.
| PNM |  | TNMP
| December 31, |  | December 31,
| 2023 |  | 2022 |  | 2023 |  | 2022
Assets: | (In thousands)
Current: |  |  |  |  |  |  |
FPPAC | $ | 65,251 |  |  | $ | 8,904 |  |  | $ | — |  |  | $ | — |
NMPRC hedging plan | — |  |  | 9,429 |  |  | — |  |  | — |
Energy efficiency costs | — |  |  | — |  |  | 50 |  |  | 1,932 |
Renewable energy rider | 5,021 |  |  | — |  |  | — |  |  | — |
SJGS Energy Transition Property | 2,724 |  |  | — |  |  | — |  |  | — |
| 72,996 |  |  | 18,333 |  |  | 50 |  |  | 1,932 |
Non-Current: |  |  |  |  |  |  |
SJGS Energy Transition Property | $ | 340,629 |  |  | $ | 343,238 |  |  | $ | — |  |  | $ | — |
SJGS - non-ETA | 122,246 |  |  | 129,285 |  |  | — |  |  | — |
PVNGS leased interest | 80,777 |  |  | — |  |  | — |  |  | — |
EIM | 18,731 |  |  | 13,102 |  |  | — |  |  | — |
TEP | 2,644 |  |  | — |  |  | — |  |  | — |
Loss on reacquired debt | 13,806 |  |  | 15,323 |  |  | 25,019 |  |  | 26,317 |
Pension and OPEB | 172,508 |  |  | 187,182 |  |  | 21,854 |  |  | 21,558 |
Deferred income taxes | 71,359 |  |  | 67,621 |  |  | 8,882 |  |  | 9,193 |
AMS surcharge | — |  |  | — |  |  | — |  |  | 6,254 |
AMS retirement and other costs | — |  |  | — |  |  | 12,343 |  |  | 12,591 |
Deferred COVID-19 costs | 5,664 |  |  | 5,664 |  |  | — |  |  | 1,053 |
Other | 10,363 |  |  | 2,526 |  |  | 7,556 |  |  | 5,779 |
| 838,727 |  |  | 763,941 |  |  | 75,654 |  |  | 82,745 |
Total regulatory assets | $ | 911,723 |  |  | $ | 782,274 |  |  | $ | 75,704 |  |  | $ | 84,677 |
Liabilities: |
Current: |  |  |  |  |  |  |
SJGS rate refunds | $ | (113,372) |  |  | $ | — |  |  | $ | — |  |  | $ | — |
PVNGS rate refunds | (19,194) |  |  | — |  |  | — |  |  | — |
Renewable energy rider, including excess return | — |  |  | (5,076) |  |  | — |  |  | — |
Energy efficiency costs | (1,454) |  |  | (2,837) |  |  | — |  |  | — |
Transmission cost recovery factor | — |  |  | — |  |  | (5,159) |  |  | (9,089) |
NMPRC hedging plan | (826) |  |  | — |  |  | — |  |  | — |
| (134,846) |  |  | (7,913) |  |  | (5,159) |  |  | (9,089) |
Non-Current: |  |  |  |  |  |  |
Cost of removal | (247,627) |  |  | (238,903) |  |  | (117,759) |  |  | (97,030) |
Deferred income taxes | (281,588) |  |  | (301,493) |  |  | (83,459) |  |  | (94,994) |
Renewable energy tax benefits | (14,463) |  |  | (15,610) |  |  | — |  |  | — |
PVNGS rate refunds | (19,194) |  |  | — |  |  | — |  |  | — |
Pension and OPEB | — |  |  | — |  |  | (3,644) |  |  | (4,518) |
COVID-19 cost savings | (900) |  |  | (900) |  |  | — |  |  | — |
Other | (1,249) |  |  | (83) |  |  | (1,434) |  |  | (1,671) |
| (565,021) |  |  | (556,989) |  |  | (206,296) |  |  | (198,213) |
Total regulatory liabilities | $ | (699,867) |  |  | $ | (564,902) |  |  | $ | (211,455) |  |  | $ | (207,302) |

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