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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | $ 2,244,926 | $ 2,222,929 | $ 2,108,474
Total Other Comprehensive Income | 3,208 | 5,888 | 7,247
Ending Balance | 2,399,051 | 2,244,926 | 2,222,929
PNM |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 1,960,324 | 2,015,264 | 1,863,752
Total Other Comprehensive Income | 7,830 | (2,399) | 6,575
Ending Balance | 2,000,775 | 1,960,324 | 2,015,264
Total |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (66,048) | (71,936) | (79,183)
Amounts reclassified from AOCI (pre-tax) | 6,864 | 2,101 | (2,320)
Income tax impact of amounts reclassified | (1,743) | (533) | 589
Other OCI changes (pre-tax) | (2,565) | 5,792 | 12,034
Income tax impact of other OCI changes | 652 | (1,472) | (3,056)
Total Other Comprehensive Income | 3,208 | 5,888 | 7,247
Ending Balance | (62,840) | (66,048) | (71,936)
Total | PNM |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (74,335) | (71,936) | (78,511)
Amounts reclassified from AOCI (pre-tax) | (2,423) | 3,277 | (1,417)
Income tax impact of amounts reclassified | 616 | (832) | 360
Other OCI changes (pre-tax) | 12,918 | (6,493) | 10,230
Income tax impact of other OCI changes | (3,281) | 1,649 | (2,598)
Total Other Comprehensive Income | 7,830 | (2,399) | 6,575
Ending Balance | (66,505) | (74,335) | (71,936)
Unrealized Gains on Available-for-Sale Securities | PNM |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 7,422 | 11,715 | 20,403
Amounts reclassified from AOCI (pre-tax) | (7,199) | (3,827) | (9,765)
Income tax impact of amounts reclassified | 1,828 | 972 | 2,480
Other OCI changes (pre-tax) | 11,529 | (1,928) | (1,881)
Income tax impact of other OCI changes | (2,928) | 490 | 478
Total Other Comprehensive Income | 3,230 | (4,293) | (8,688)
Ending Balance | 10,652 | 7,422 | 11,715
Pension Liability Adjustment | PNM |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (81,757) | (83,651) | (98,914)
Amounts reclassified from AOCI (pre-tax) | 4,776 | 7,104 | 8,348
Income tax impact of amounts reclassified | (1,212) | (1,804) | (2,120)
Other OCI changes (pre-tax) | 1,389 | (4,565) | 12,111
Income tax impact of other OCI changes | (353) | 1,159 | (3,076)
Total Other Comprehensive Income | 4,600 | 1,894 | 15,263
Ending Balance | (77,157) | (81,757) | (83,651)
Fair Value Adjustment for Cash Flow Hedges |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 8,287 | 0 | (672)
Amounts reclassified from AOCI (pre-tax) | 9,287 | (1,176) | (903)
Income tax impact of amounts reclassified | (2,359) | 299 | 229
Other OCI changes (pre-tax) | (15,483) | 12,285 | 1,804
Income tax impact of other OCI changes | 3,933 | (3,121) | (458)
Total Other Comprehensive Income | (4,622) | 8,287 | 672
Ending Balance | $ 3,665 | $ 8,287 | $ 0

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