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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Beginning balance | $ 2,404,730 | $ 2,264,802 | $ 2,399,051 | $ 2,244,926
Total Other Comprehensive Income (Loss) | (2,292) | 5,119 | (7,060) | 6,813
Ending balance | 2,451,680 | 2,313,596 | 2,451,680 | 2,313,596
Total |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Beginning balance | (67,608) | (64,354) | (62,840) | (66,048)
Amounts reclassified from AOCI (pre-tax) |  |  | (4,570) | 1,005
Income tax impact of amounts reclassified |  |  | 1,161 | (255)
Other OCI changes (pre-tax) |  |  | (4,894) | 8,127
Income tax impact of other OCI changes |  |  | 1,243 | (2,064)
Total Other Comprehensive Income (Loss) | (2,292) | 5,119 | (7,060) | 6,813
Ending balance | (69,900) | (59,235) | (69,900) | (59,235)
Fair Value Adjustment for Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Beginning balance |  |  | 3,665 | 8,287
Amounts reclassified from AOCI (pre-tax) |  |  | 5,563 | 1,197
Income tax impact of amounts reclassified |  |  | (1,413) | (304)
Other OCI changes (pre-tax) |  |  | (4,307) | 3,567
Income tax impact of other OCI changes |  |  | 1,094 | (906)
Total Other Comprehensive Income (Loss) |  |  | 937 | 3,554
Ending balance | 4,602 | 11,841 | 4,602 | 11,841
PNM |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Beginning balance | 2,034,870 | 2,017,995 | 2,000,775 | 1,960,324
Total Other Comprehensive Income (Loss) | (1,131) | (219) | (7,997) | 3,259
Ending balance | 2,119,459 | 2,047,702 | 2,119,459 | 2,047,702
PNM | Total |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Beginning balance | (73,371) | (70,857) | (66,505) | (74,335)
Amounts reclassified from AOCI (pre-tax) |  |  | (10,133) | (192)
Income tax impact of amounts reclassified |  |  | 2,574 | 49
Other OCI changes (pre-tax) |  |  | (587) | 4,560
Income tax impact of other OCI changes |  |  | 149 | (1,158)
Total Other Comprehensive Income (Loss) | (1,131) | (219) | (7,997) | 3,259
Ending balance | (74,502) | (71,076) | (74,502) | (71,076)
PNM | Unrealized Gains on Available-for-Sale Debt Securities |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Beginning balance |  |  | 10,652 | 7,422
Amounts reclassified from AOCI (pre-tax) |  |  | (12,566) | (2,580)
Income tax impact of amounts reclassified |  |  | 3,192 | 655
Other OCI changes (pre-tax) |  |  | (587) | 4,560
Income tax impact of other OCI changes |  |  | 149 | (1,158)
Total Other Comprehensive Income (Loss) |  |  | (9,812) | 1,477
Ending balance | 840 | 8,899 | 840 | 8,899
PNM | Pension Liability Adjustment |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
Beginning balance |  |  | (77,157) | (81,757)
Amounts reclassified from AOCI (pre-tax) |  |  | 2,433 | 2,388
Income tax impact of amounts reclassified |  |  | (618) | (606)
Other OCI changes (pre-tax) |  |  | 0 | 0
Income tax impact of other OCI changes |  |  | 0 | 0
Total Other Comprehensive Income (Loss) |  |  | 1,815 | 1,782
Ending balance | $ (75,342) | $ (79,975) | $ (75,342) | $ (79,975)

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