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Related Party Transactions (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Related Party Transaction [Line Items] |  |  |
Ownership percentage | 50.00% |  |
Services billings: | PNMR to PNM |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | $ 107,747 | $ 100,872 | $ 96,327
Services billings: | PNMR to TNMP |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 41,798 | 39,053 | 36,554
Services billings: | PNM to TNMP |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 404 | 383 | 375
Services billings: | TNMP to PNMR |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 141 | 141 | 141
Services billings: | TNMP to PNM |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 0 | 0 | 0
Services billings: | PNMR to NMRD |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 221 | 260 | 238
Renewable energy purchases: | PNM from NMRD |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 11,879 | 9,638 | 3,124
Interconnection and facility study billings: | PNMR to PNM |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 0 | 0 | 68,820
Interconnection and facility study billings: | PNM to NMRD |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 225 | 350 | 650
Interconnection and facility study billings: | PNM to PNMR |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 0 | 0 | 0
Interconnection and facility study billings: | NMRD to PNM |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 1,276 | 0 | 0
Interest billings: | PNMR to PNM |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 31 | 6 | 3,365
Interest billings: | PNMR to TNMP |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 0 | 2 | 42
Interest billings: | PNM to PNMR |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 144 | 255 | 299
Income tax sharing payments: | PNMR to PNM |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 19,492 | 0 | 0
Income tax sharing payments: | PNMR to TNMP |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 0 | 0 | 0
Income tax sharing payments: | TNMP to PNMR |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | 12,842 | 15,820 | 12,996
Income tax sharing payments: | PNM to PNMR |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of related party transaction | $ 0 | $ 0 | $ 0

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