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Income Taxes - Schedule of Components of Net Accumulated Deferred Income Tax Liability (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Deferred tax assets: |  |
Net operating loss | $ 31,592 | $ 16,833
Regulatory liabilities related to income taxes | 82,702 | 90,461
Federal tax credit carryforwards | 126,770 | 124,510
Regulatory disallowances | 42,330 | 42,330
Regulatory liability SJGS retirement credits | 40 | 28,797
Other | 52,955 | 35,492
Total deferred tax assets | 336,389 | 338,423
Deferred tax liabilities: |  |
Depreciation and plant related | (794,203) | (738,078)
Investment tax credit | (81,068) | (95,046)
Regulatory assets related to income taxes | (84,053) | (80,643)
Pension | (41,383) | (41,141)
Regulatory asset for shutdown of SJGS Units 2 and 3 | (20,860) | (22,454)
Regulatory asset SJGS energy transition property | (85,365) | (86,521)
Regulatory asset PVNGS investment | (21,044) | (20,503)
PVNGS trusts | (48,421) | (41,767)
Other | (59,384) | (57,550)
Total deferred tax liabilities | (1,235,781) | (1,183,703)
Net accumulated deferred income tax liabilities | (899,392) | (845,280)
PNM |  |
Deferred tax assets: |  |
Net operating loss | 0 | 0
Regulatory liabilities related to income taxes | 64,481 | 71,546
Federal tax credit carryforwards | 93,481 | 80,586
Regulatory disallowances | 42,330 | 42,330
Regulatory liability SJGS retirement credits | 40 | 28,797
Other | 35,650 | 35,993
Total deferred tax assets | 235,982 | 259,252
Deferred tax liabilities: |  |
Depreciation and plant related | (582,089) | (545,815)
Investment tax credit | (81,068) | (73,844)
Regulatory assets related to income taxes | (75,464) | (71,742)
Pension | (36,678) | (36,483)
Regulatory asset for shutdown of SJGS Units 2 and 3 | (20,860) | (22,454)
Regulatory asset SJGS energy transition property | (85,365) | (86,521)
Regulatory asset PVNGS investment | (21,044) | (20,503)
PVNGS trusts | (48,421) | (41,767)
Other | (41,211) | (44,160)
Total deferred tax liabilities | (992,200) | (943,289)
Net accumulated deferred income tax liabilities | (756,218) | (684,037)
TNMP |  |
Deferred tax assets: |  |
Regulatory liabilities related to income taxes | 18,221 | 18,915
Other | 4,522 | 5,534
Total deferred tax assets | 22,743 | 24,449
Deferred tax liabilities: |  |
Depreciation and plant related | (200,709) | (179,483)
Regulatory assets related to income taxes | (8,589) | (8,901)
Loss on reacquired debt | (4,981) | (5,254)
Pension | (4,706) | (4,659)
AMS | (2,709) | (2,613)
Other | (9,156) | (2,287)
Total deferred tax liabilities | (230,850) | (203,197)
Net accumulated deferred income tax liabilities | $ (208,107) | $ (178,748)

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