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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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