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Equity Method Investment - Narrative (Details) |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 27, 2024 USD ($) | Mar. 31, 2021 USD ($) | Feb. 28, 2021 USD ($) | Dec. 31, 2023 USD ($) MW | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 22, 2023 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Dividend in excess of equity earnings |  |  |  | $ 0 | $ 0 | $ 572,000 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | NMRD |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration on disposal |  |  |  |  |  |  | $ 230,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | NMRD | Subsequent Event |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Proceeds received | $ 117,000,000 |  |  |  |  |  |
PNMR Development | NMRD |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Distributions from NMRD |  |  | $ 3,000,000 |  |  |  |
Equity in earnings |  | $ 2,400,000 |  |  |  |  |
Dividend in excess of equity earnings |  |  |  | $ 600,000 |  |  |
NMRD |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Renewable energy capacity in operating (in mw) | MW |  |  |  | 185.1 |  |  |
Megawatts supplying energy to data center (in mw) | MW |  |  |  | 180 |  |  |
Megawatts supplying energy to cooperative (in mw) | MW |  |  |  | 1.9 |  |  |
Megawatts supplying energy to power city (in mw) | MW |  |  |  | 1.2 |  |  |
NMRD | PNMR Development |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  | 50.00% |  |  |
Contribution to construction activities |  |  |  | $ 26,300,000 | $ 0 | $ 0 |
NMRD | Central New Mexico Electric Cooperative |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Megawatts supplying energy to cooperative (in mw) | MW |  |  |  | 2.0 |  |  |

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