Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
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	$ 115,415	$ 107,747	$ 100,872
Services billings: | PNMR to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	42,293	41,798	39,053
Services billings: | PNM to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	411	404	383
Services billings: | TNMP to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	141	141	141
Services billings: | TNMP to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0
Services billings: | PNMR to NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	308	221	260
Renewable energy purchases: | PNM from NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	11,795	11,879	9,638
Interconnection and facility study billings: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0
Interconnection and facility study billings: | PNM to NMRD
Related Party Transaction [Line Items]
Amount of related party transaction	0	225	350
Interconnection and facility study billings: | PNM to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0
Interconnection and facility study billings: | NMRD to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	1,276	0
Interest billings: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	13	31	6
Interest billings: | PNMR to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	166	0	2
Interest billings: | PNM to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	249	144	255
Income tax sharing payments: | PNMR to PNM
Related Party Transaction [Line Items]
Amount of related party transaction	0	19,492	0
Income tax sharing payments: | PNMR to TNMP
Related Party Transaction [Line Items]
Amount of related party transaction	0	0	0
Income tax sharing payments: | TNMP to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	8,341	12,842	15,820
Income tax sharing payments: | PNM to PNMR
Related Party Transaction [Line Items]
Amount of related party transaction	$ 11,602	$ 0	$ 0