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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Information regarding AOCI is as follows:
| Accumulated Other Comprehensive Income (Loss)
| PNM |  | PNMR
| Unrealized Gains on Available-for-Sale Securities |  | Pension Liability Adjustment |  | Total |  | Fair Value Adjustment for Cash Flow Hedges |  | Total
| (In thousands)
Balance at December 31, 2016 | $ | 4,320 |  |  | $ | (96,748 | ) |  | $ | (92,428 | ) |  | $ | (23 | ) |  | $ | (92,451 | )
Amounts reclassified from AOCI (pre-tax) | (17,567 | ) |  | 6,452 |  |  | (11,115 | ) |  | 581 |  |  | (10,534 | )
Income tax impact of amounts reclassified | 6,816 |  |  | (2,504 | ) |  | 4,312 |  |  | (225 | ) |  | 4,087 |
Other OCI changes (pre-tax) | 28,160 |  |  | 3,618 |  |  | 31,778 |  |  | 1,000 |  |  | 32,778 |
Income tax impact of other OCI changes | (10,927 | ) |  | (919 | ) |  | (11,846 | ) |  | (388 | ) |  | (12,234 | )
Net after-tax change | 6,482 |  |  | 6,647 |  |  | 13,129 |  |  | 968 |  |  | 14,097 |
Reclassification of stranded income taxes to retained earnings (Note 18) | 2,367 |  |  | (20,161 | ) |  | (17,794 | ) |  | 208 |  |  | (17,586 | )
Balance at December 31, 2017, as originally reported | 13,169 |  |  | (110,262 | ) |  | (97,093 | ) |  | 1,153 |  |  | (95,940 | )
Cumulative effect adjustment (Note 9) | (11,208 | ) |  | — |  |  | (11,208 | ) |  | — |  |  | (11,208 | )
Balance at January 1, 2018, as adjusted | 1,961 |  |  | (110,262 | ) |  | (108,301 | ) |  | 1,153 |  |  | (107,148 | )
Amounts reclassified from AOCI (pre-tax) | (3,819 | ) |  | 7,568 |  |  | 3,749 |  |  | 216 |  |  | 3,965 |
Income tax impact of amounts reclassified | 970 |  |  | (1,922 | ) |  | (952 | ) |  | (56 | ) |  | (1,008 | )
Other OCI changes (pre-tax) | 3,790 |  |  | (10,382 | ) |  | (6,592 | ) |  | 570 |  |  | (6,022 | )
Income tax impact of other OCI changes | (963 | ) |  | 2,637 |  |  | 1,674 |  |  | (145 | ) |  | 1,529 |
Net after-tax change | (22 | ) |  | (2,099 | ) |  | (2,121 | ) |  | 585 |  |  | (1,536 | )
Balance at December 31, 2018 | 1,939 |  |  | (112,361 | ) |  | (110,422 | ) |  | 1,738 |  |  | (108,684 | )
Amounts reclassified from AOCI (pre-tax) | (14,063 | ) |  | 7,404 |  |  | (6,659 | ) |  | 733 |  |  | (5,926 | )
Income tax impact of amounts reclassified | 3,572 |  |  | (1,880 | ) |  | 1,692 |  |  | (186 | ) |  | 1,506 |
Other OCI changes (pre-tax) | 25,724 |  |  | (3,829 | ) |  | 21,895 |  |  | (3,495 | ) |  | 18,400 |
Income tax impact of other OCI changes | (6,534 | ) |  | 973 |  |  | (5,561 | ) |  | 888 |  |  | (4,673 | )
Net after-tax change | 8,699 |  |  | 2,668 |  |  | 11,367 |  |  | (2,060 | ) |  | 9,307 |
Balance at December 31, 2019 | $ | 10,638 |  |  | $ | (109,693 | ) |  | $ | (99,055 | ) |  | $ | (322 | ) |  | $ | (99,377 | )

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