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Equity Method Investment (Details) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Feb. 28, 2021 USD ($) | Mar. 31, 2022 USD ($) MW | Mar. 31, 2021 USD ($)
Business Acquisition [Line Items] |  |  |
Ownership |  | 50.00% |
Distributions from NMRD |  | $ 0 | $ 572
NMRD |  |  |
Business Acquisition [Line Items] |  |  |
Renewable energy capacity in operating (in mw) | MW |  | 135.1 |
PNMR Development | NMRD |  |  |
Business Acquisition [Line Items] |  |  |
Ownership |  | 50.00% |
Distributions from NMRD | $ 3,000 |  |
Earnings from equity method investments, net of dividends or distributions | $ 2,400 |  |
Proceeds from equity method investment, distribution, return of capital |  |  | $ 600
AEP OnSite Partners | NMRD |  |  |
Business Acquisition [Line Items] |  |  |
Ownership |  | 50.00% |

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