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Related Party Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Service billings [Member] | PNMR to PNM [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | $ 21,894 | $ 20,813 | $ 65,961 | $ 64,069
Service billings [Member] | PNMR to TNMP [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 6,707 | 6,471 | 20,366 | 20,695
Service billings [Member] | PNM to TNMP [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 136 | 142 | 424 | 402
Service billings [Member] | TNMP to PNMR [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 0 | 20 | 0 | 21
Interest charges [Member] | PNMR to PNM [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 10 | 1 | 38 | 55
Interest charges [Member] | PNMR to TNMP [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 34 | 65 | 167 | 245
Interest charges [Member] | PNM to PNMR [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 24 | 28 | 79 | 79
Income tax sharing payments [Member] | PNMR to PNM [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 0 | 0 | 1,450 | 0
Income tax sharing payments [Member] | PNMR to TNMP [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount of transactions with related party during the financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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