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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Services billings: | TXNM to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	$ 30,866	$ 33,095	$ 98,270	$ 99,525
Services billings: | TXNM to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	12,136	13,192	39,621	40,314
Services billings: | PNM to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	82	178	247	368
Services billings: | TNMP to TXNM
Related Party Transaction [Line Items]
Amount of related party transaction	22	75	78	85
Services billings: | TNMP to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	497	0	497
Services billings: | TXNM to NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0	66
Renewable energy purchases: | PNM from NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0	1,523
Interest billings: | TXNM to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	49	77	133	116
Interest billings: | TXNM to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	24	23	210	202
Interest billings: | PNM to TXNM
Related Party Transaction [Line Items]
Amount of related party transaction	$ 133	$ 156	$ 398	$ 465

X

- Definition

Amount of transactions with related party during the financial reporting period.

+ References

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-Topic 850
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