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Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
NMRD
Related Party Transaction [Line Items]
Ownership percentage	50.00%
Services billings: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	$ 124,321	$ 115,415	$ 107,747
Services billings: | PNMR to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	47,470	42,293	41,798
Services billings: | PNM to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	349	411	404
Services billings: | TNMP to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	141	141	141
Services billings: | PNMR to NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	333	308	221
Renewable energy purchases: | PNM from NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	12,717	11,795	11,879
Interconnection and facility study billings: | PNM to NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	225
Interconnection and facility study billings: | NMRD to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	1,276
Interest billings: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	23	13	31
Interest billings: | PNMR to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	129	166	0
Interest billings: | PNM to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	582	249	144
Income tax sharing payments: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	5,338	0	19,492
Income tax sharing payments: | TNMP to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	15,749	8,341	12,842
Income tax sharing payments: | PNM to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	$ 0	$ 11,602	$ 0

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Section S99
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