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Related Party Transactions (Tables) | 3 Months Ended
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Mar. 31, 2014
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions [Table Text Block] | The table below summarizes the nature and amount of related party transactions of PNMR, PNM, and TNMP:
| Three Months Ended
| March 31,
| 2014 |  | 2013
| (In thousands)
Services billings: |  |  |
PNMR to PNM | $ | 21,066 |  |  | $ | 22,652 |
PNMR to TNMP | 7,261 |  |  | 7,361 |
PNM to TNMP | 109 |  |  | 108 |
TNMP to PNMR | — |  |  | 2 |
Interest billings: |  |  |
PNMR to TNMP | 96 |  |  | 96 |
PNMR to PNM | 53 |  |  | 1 |
PNM to PNMR | 26 |  |  | 41 |
Income tax sharing payments: |  |  |
PNMR to PNM | — |  |  | — |
PNMR to TNMP | — |  |  | — |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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