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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2017
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Information regarding accumulated other comprehensive income (loss) for the three months ended March 31, 2017 and 2016 is as follows:
| Accumulated Other Comprehensive Income (Loss)
| PNM |  | PNMR
| Unrealized |  |  |  |  |  | Fair Value |  |
| Gains on |  |  |  |  |  | Adjustment |  |
| Available-for- |  | Pension |  |  |  | for Cash |  |
| Sale |  | Liability |  |  |  | Flow |  |
| Securities |  | Adjustment |  | Total |  | Hedges |  | Total
| (In thousands)
Balance at December 31, 2016 | $ | 4,320 |  |  | $ | (96,748 | ) |  | $ | (92,428 | ) |  | $ | (23 | ) |  | $ | (92,451 | )
Amounts reclassified from AOCI (pre-tax) | (2,763 | ) |  | 1,618 |  |  | (1,145 | ) |  | 112 |  |  | (1,033 | )
Income tax impact of amounts reclassified | 1,078 |  |  | (631 | ) |  | 447 |  |  | (44 | ) |  | 403 |
Other OCI changes (pre-tax) | 7,766 |  |  | — |  |  | 7,766 |  |  | (185 | ) |  | 7,581 |
Income tax impact of other OCI changes | (3,030 | ) |  | — |  |  | (3,030 | ) |  | 72 |  |  | (2,958 | )
Net after-tax change | 3,051 |  |  | 987 |  |  | 4,038 |  |  | (45 | ) |  | 3,993 |
Balance at March 31, 2017 | $ | 7,371 |  |  | $ | (95,761 | ) |  | $ | (88,390 | ) |  | $ | (68 | ) |  | $ | (88,458 | )
Balance at December 31, 2015 | $ | 17,346 |  |  | $ | (88,822 | ) |  | $ | (71,476 | ) |  | $ | 44 |  |  | $ | (71,432 | )
Amounts reclassified from AOCI (pre-tax) | (11,210 | ) |  | 1,376 |  |  | (9,834 | ) |  | 146 |  |  | (9,688 | )
Income tax impact of amounts reclassified | 4,374 |  |  | (537 | ) |  | 3,837 |  |  | (57 | ) |  | 3,780 |
Other OCI changes (pre-tax) | 5,458 |  |  | — |  |  | 5,458 |  |  | (1,289 | ) |  | 4,169 |
Income tax impact of other OCI changes | (2,130 | ) |  | — |  |  | (2,130 | ) |  | 503 |  |  | (1,627 | )
Net after-tax change | (3,508 | ) |  | 839 |  |  | (2,669 | ) |  | (697 | ) |  | (3,366 | )
Balance at March 31, 2016 | $ | 13,838 |  |  | $ | (87,983 | ) |  | $ | (74,145 | ) |  | $ | (653 | ) |  | $ | (74,798 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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