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Related Party Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Services billings: | TXNM to PNM |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | $ 33,095 | $ 29,509 | $ 99,525 | $ 90,151
Services billings: | TXNM to TNMP |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 13,192 | 10,976 | 40,314 | 34,703
Services billings: | PNM to TNMP |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 178 | 100 | 368 | 269
Services billings: | TNMP to TXNM |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 75 | 35 | 85 | 106
Services billings: | TNMP to PNM |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 497 | 0 | 497 | 0
Services billings: | TXNM to NMRD |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 0 | 71 | 66 | 235
Renewable energy purchases: | PNM from NMRD |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 0 | 3,652 | 1,523 | 9,761
Interest billings: | TXNM to PNM |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 77 | 8 | 116 | 18
Interest billings: | TXNM to TNMP |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 23 | 117 | 202 | 128
Interest billings: | PNM to TXNM |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 156 | 153 | 465 | 426
Income tax sharing payments: | TXNM to PNM |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | 0 | 0 | 0 | 0
Income tax sharing payments: | TNMP to TXNM |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount of related party transaction | $ 0 | $ 0 | $ 0 | $ 0

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