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Regulatory Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2014
Public Service Company of New Mexico [Member] |
Regulatory Assets [Line Items] |
Regulatory Assets and Liabilities [Table Text Block] | Regulatory assets and liabilities reflected in the Consolidated Balance Sheets are presented below. PNM
| December 31,
| 2014 |  | 2013
Assets: | (In thousands)
Current: |  |  |
FPPAC | $ | 43,980 |  |  | $ | 19,394 |
Non-Current: |  |  |
Coal mine reclamation costs | 34,224 |  |  | 40,144 |
Deferred income taxes | 63,645 |  |  | 61,850 |
Loss on reacquired debt | 25,439 |  |  | 27,490 |
Pension and OPEB | 222,545 |  |  | 206,691 |
FPPAC | — |  |  | 25,386 |
Renewable energy costs | 5,263 |  |  | 13,311 |
Other | 5,929 |  |  | 9,345 |
| 357,045 |  |  | 384,217 |
Total regulatory assets | $ | 401,025 |  |  | $ | 403,611 |
Liabilities: |  |  |
Current: |  |  |
Other | $ | (1,703 | ) |  | $ | (1,081 | )
Non-Current: |  |  |
Cost of removal | (277,148 | ) |  | (266,075 | )
Deferred income taxes | (75,941 | ) |  | (80,495 | )
AROs | (35,834 | ) |  | (37,567 | )
Renewable energy tax benefits | (24,854 | ) |  | (26,011 | )
Other | (11,704 | ) |  | (4,463 | )
| (425,481 | ) |  | (414,611 | )
Total regulatory liabilities | $ | (427,184 | ) |  | $ | (415,692 | )
Texas-New Mexico Power Company [Member] |
Regulatory Assets [Line Items] |
Regulatory Assets and Liabilities [Table Text Block] | TNMP
| December 31,
| 2014 |  | 2013
Assets: | (In thousands)
Current: |  |  |
Transmission cost recovery factor | $ | 2,482 |  |  | $ | 4,250 |
Other | 1,393 |  |  | 772 |
| 3,875 |  |  | 5,022 |
Non-Current: |  |  |
CTC, including carrying charges | 55,292 |  |  | 63,606 |
Deferred income taxes | 10,556 |  |  | 10,868 |
Pension | 23,803 |  |  | 19,938 |
Loss on reacquired debt | 36,703 |  |  | 38,616 |
AMS retirement costs | 6,453 |  |  | 5,083 |
Other | 1,155 |  |  | 1,627 |
| 133,962 |  |  | 139,738 |
Total regulatory assets | $ | 137,837 |  |  | $ | 144,760 |
Liabilities: |  |  |
Non-Current: |  |  |
Cost of removal | $ | (29,391 | ) |  | $ | (30,863 | )
Deferred income taxes | (3,923 | ) |  | (4,563 | )
AMS surcharge | (5,227 | ) |  | (7,251 | )
OPEB | (2,121 | ) |  | (3,361 | )
Total regulatory liabilities | $ | (40,662 | ) |  | $ | (46,038 | )

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