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Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2021
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Information regarding accumulated other comprehensive income (loss) for the six months ended June 30, 2021 and 2020 is as follows:
| Accumulated Other Comprehensive Income (Loss)
| PNM |  |  |  | Corporate and Other |  | PNMR Consolidated
| Unrealized Gains on Available-for-Sale Debt Securities |  | Pension Liability Adjustment |  |  |  |  |  | Fair Value Adjustment for Cash Flow Hedges |  |
|  |  | Total |  |  |  |  | Total
| (In thousands)
Balance at December 31, 2020 | $ | 20,403 |  |  | $ | (98,914) |  |  | $ | (78,511) |  |  |  |  | $ | (672) |  |  | $ | (79,183) |
Amounts reclassified from AOCI (pre-tax) | (5,632) |  |  | 4,174 |  |  | (1,458) |  |  |  |  | (903) |  |  | (2,361) |
Income tax impact of amounts reclassified | 1,430 |  |  | (1,060) |  |  | 370 |  |  |  |  | 229 |  |  | 599 |
Other OCI changes (pre-tax) | 329 |  |  | — |  |  | 329 |  |  |  |  | 1,804 |  |  | 2,133 |
Income tax impact of other OCI changes | (83) |  |  | — |  |  | (83) |  |  |  |  | (458) |  |  | (541) |
Net after-tax change | (3,956) |  |  | 3,114 |  |  | (842) |  |  |  |  | 672 |  |  | (170) |
Balance at June 30, 2021 | $ | 16,447 |  |  | $ | (95,800) |  |  | $ | (79,353) |  |  |  |  | $ | — |  |  | $ | (79,353) |
Balance at December 31, 2019 | $ | 10,638 |  |  | $ | (109,693) |  |  | $ | (99,055) |  |  |  |  | $ | (322) |  |  | $ | (99,377) |
Amounts reclassified from AOCI (pre-tax) | (3,059) |  |  | 4,150 |  |  | 1,091 |  |  |  |  | (500) |  |  | 591 |
Income tax impact of amounts reclassified | 777 |  |  | (1,054) |  |  | (277) |  |  |  |  | 127 |  |  | (150) |
Other OCI changes (pre-tax) | 9,717 |  |  | — |  |  | 9,717 |  |  |  |  | (1,198) |  |  | 8,519 |
Income tax impact of other OCI changes | (2,468) |  |  | — |  |  | (2,468) |  |  |  |  | 304 |  |  | (2,164) |
Net after-tax change | 4,967 |  |  | 3,096 |  |  | 8,063 |  |  |  |  | (1,267) |  |  | 6,796 |
Balance at June 30, 2020 | $ | 15,605 |  |  | $ | (106,597) |  |  | $ | (90,992) |  |  |  |  | $ | (1,589) |  |  | $ | (92,581) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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