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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
PNMR Development
Related Party Transaction [Line Items]
Ownership	50.00%		50.00%
Services billings: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	$ 29,509	$ 26,281	$ 90,151	$ 82,352
Services billings: | PNMR to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	10,976	9,554	34,703	30,110
Services billings: | PNM to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	100	107	269	322
Services billings: | TNMP to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	35	35	106	106
Services billings: | PNMR to NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	71	81	235	226
Renewable energy purchases: | PNM from NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	3,652	3,221	9,761	9,642
Interconnection and facility study billings: | PNM from NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0	0
Interconnection and facility study billings: | PNM to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0	0
Interconnection and facility study billings: | NMRD to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0	0
Interest billings: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	8	4	18	13
Interest billings: | PNMR to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	117	50	128	166
Interest billings: | PNM to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	153	73	426	143
Income tax sharing payments: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0	0
Income tax sharing payments: | TNMP to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	$ 0	$ 0	$ 0	$ 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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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