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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Reconciliation of Asset Retirement Obligations Liabilities | A reconciliation of the ARO liabilities is as follows:
| TXNM |  | PNM |  | TNMP
| (In thousands)
Liability at December 31, 2021 | $ | 234,146 |  |  | $ | 233,383 |  |  | $ | 763 |
Liabilities incurred | — |  |  | — |  |  | — |
Liabilities settled | — |  |  | — |  |  | — |
Accretion expense | 10,767 |  |  | 10,702 |  |  | 65 |
Revisions to estimated cash flows(1) | (21,536) |  |  | (21,536) |  |  | — |
Liability at December 31, 2022 | 223,377 |  |  | 222,549 |  |  | 828 |
Liabilities incurred | — |  |  | — |  |  | — |
Liabilities settled | (3,482) |  |  | (3,482) |  |  | — |
Accretion expense | 10,218 |  |  | 10,148 |  |  | 70 |
Revisions to estimated cash flows(2) | 15,418 |  |  | 15,418 |  |  | — |
Liability at December 31, 2023 | 245,531 |  |  | 244,633 |  |  | 898 |
Liabilities incurred | — |  |  | — |  |  | — |
Liabilities settled | (12,451) |  |  | (12,432) |  |  | (19) |
Accretion expense | 11,538 |  |  | 11,462 |  |  | 76 |
Revisions to estimated cash flows | — |  |  | — |  |  | — |
Liability at December 31, 2024 | $ | 244,618 |  |  | $ | 243,663 |  |  | $ | 955 |
(1) Reflects a decrease of $21.5 million related to an updated SJGS decommissioning study. (2) Reflects an increase of $15.4 million related to an updated PVNGS decommissioning study.

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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