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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2014
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Information regarding accumulated other comprehensive income (loss) for the three months ended March 31, 2014 and 2013 is as follows:
| Accumulated Other Comprehensive Income (Loss)
| Unrealized |  |  |  | Fair Value |  |
| Gain on |  | Pension |  | Adjustment |  |
| Available-for- |  | Liability |  | for Cash Flow |  |
| Sale Securities |  | Adjustment |  | Hedges |  | Total
| (In thousands)
PNMR |  |  |  |  |  |  |
Balance at December 31, 2013 | $ | 25,748 |  |  | $ | (83,625 | ) |  | $ | (263 | ) |  | $ | (58,140 | )
Amounts reclassified from AOCI (pre-tax) | (3,255 | ) |  | 1,288 |  |  | 55 |  |  | (1,912 | )
Income tax impact of amounts reclassified | 1,283 |  |  | (508 | ) |  | (19 | ) |  | 756 |
Other OCI changes (pre-tax) | 3,379 |  |  | — |  |  | (153 | ) |  | 3,226 |
Income tax impact of other OCI changes | (1,332 | ) |  | — |  |  | 53 |  |  | (1,279 | )
Net change after income taxes | 75 |  |  | 780 |  |  | (64 | ) |  | 791 |
Balance at March 31, 2014 | $ | 25,823 |  |  | $ | (82,845 | ) |  | $ | (327 | ) |  | $ | (57,349 | )
PNM |  |  |  |  |  |  |
Balance at December 31, 2013 | $ | 25,748 |  |  | $ | (83,625 | ) |  | $ | — |  |  | $ | (57,877 | )
Amounts reclassified from AOCI (pre-tax) | (3,255 | ) |  | 1,288 |  |  | — |  |  | (1,967 | )
Income tax impact of amounts reclassified | 1,283 |  |  | (508 | ) |  | — |  |  | 775 |
Other OCI changes (pre-tax) | 3,379 |  |  | — |  |  | — |  |  | 3,379 |
Income tax impact of other OCI changes | (1,332 | ) |  | — |  |  | — |  |  | (1,332 | )
Net change after income taxes | 75 |  |  | 780 |  |  | — |  |  | 855 |
Balance at March 31, 2014 | $ | 25,823 |  |  | $ | (82,845 | ) |  | $ | — |  |  | $ | (57,022 | )
TNMP |  |  |  |  |  |  |
Balance at December 31, 2013 | $ | — |  |  | $ | — |  |  | $ | (263 | ) |  | $ | (263 | )
Amounts reclassified from AOCI (pre-tax) | — |  |  | — |  |  | 55 |  |  | 55 |
Income tax impact of amounts reclassified | — |  |  | — |  |  | (19 | ) |  | (19 | )
Other OCI changes (pre-tax) | — |  |  | — |  |  | (153 | ) |  | (153 | )
Income tax impact of other OCI changes | — |  |  | — |  |  | 53 |  |  | 53 |
Net change after income taxes | — |  |  | — |  |  | (64 | ) |  | (64 | )
Balance at March 31, 2014 | $ | — |  |  | $ | — |  |  | $ | (327 | ) |  | $ | (327 | )
| Accumulated Other Comprehensive Income (Loss)
| Unrealized |  |  |  | Fair Value |  |
| Gain on |  | Pension |  | Adjustment |  |
| Available-for- |  | Liability |  | for Cash Flow |  |
| Sale Securities |  | Adjustment |  | Hedges |  | Total
| (In thousands)
PNMR |  |  |  |  |  |  |
Balance at December 31, 2012 | $ | 16,406 |  |  | $ | (97,820 | ) |  | $ | (216 | ) |  | $ | (81,630 | )
Amounts reclassified from AOCI (pre-tax) | (1,336 | ) |  | 1,591 |  |  | 48 |  |  | 303 |
Income tax impact of amounts reclassified | 529 |  |  | (631 | ) |  | (17 | ) |  | (119 | )
Other OCI changes (pre-tax) | 7,858 |  |  | — |  |  | 12 |  |  | 7,870 |
Income tax impact of other OCI changes | (3,111 | ) |  | — |  |  | (4 | ) |  | (3,115 | )
Net change after income taxes | 3,940 |  |  | 960 |  |  | 39 |  |  | 4,939 |
Balance at March 31, 2013 | $ | 20,346 |  |  | $ | (96,860 | ) |  | $ | (177 | ) |  | $ | (76,691 | )
PNM |  |  |  |  |  |  |
Balance at December 31, 2012 | $ | 16,406 |  |  | $ | (97,820 | ) |  | $ | — |  |  | $ | (81,414 | )
Amounts reclassified from AOCI (pre-tax) | (1,336 | ) |  | 1,591 |  |  | — |  |  | 255 |
Income tax impact of amounts reclassified | 529 |  |  | (631 | ) |  | — |  |  | (102 | )
Other OCI changes (pre-tax) | 7,858 |  |  | — |  |  | — |  |  | 7,858 |
Income tax impact of other OCI changes | (3,111 | ) |  | — |  |  | — |  |  | (3,111 | )
Net change after income taxes | 3,940 |  |  | 960 |  |  | — |  |  | 4,900 |
Balance at March 31, 2013 | $ | 20,346 |  |  | $ | (96,860 | ) |  | $ | — |  |  | $ | (76,514 | )
TNMP |  |  |  |  |  |  |
Balance at December 31, 2012 | $ | — |  |  | $ | — |  |  | $ | (216 | ) |  | $ | (216 | )
Amounts reclassified from AOCI (pre-tax) | — |  |  | — |  |  | 48 |  |  | 48 |
Income tax impact of amounts reclassified | — |  |  | — |  |  | (17 | ) |  | (17 | )
Other OCI changes (pre-tax) | — |  |  | — |  |  | 12 |  |  | 12 |
Income tax impact of other OCI changes | — |  |  | — |  |  | (4 | ) |  | (4 | )
Net change after income taxes | — |  |  | — |  |  | 39 |  |  | 39 |
Balance at March 31, 2013 | $ | — |  |  | $ | — |  |  | $ | (177 | ) |  | $ | (177 | )

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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=28358780&loc=SL7669686-108580 + Details
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