Condensed Consolidated Balance Sheets - PNM - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 7,768	$ 4,078
Accounts receivable, net of allowance for credit losses	175,193	183,669
Unbilled revenues	68,271	63,473
Other receivables	25,719	20,320
Materials, supplies, and fuel stock	83,391	66,733
Regulatory assets	99,388	20,265
Prepaid assets	21,705	18,465
Income taxes receivable	1,883	2,351
Other current assets	5,909	31,624
Total current assets	489,227	410,978
Other Property and Investments:
Investment securities	421,377	417,476
Other investments	172	177
Non-utility property, net	29,584	26,841
Total other property and investments	569,702	535,114
Utility Plant:
Plant in service, held for future use, and to be abandoned	9,344,655	9,164,564
Less accumulated depreciation and amortization	2,728,523	2,659,952
Net plant in service and plant held for future use	6,616,132	6,504,612
Construction work in progress	717,353	372,988
Nuclear fuel, net of accumulated amortization of $34,759 and $43,985	77,368	95,223
Net utility plant	7,410,853	6,972,823
Deferred Charges and Other Assets:
Regulatory assets	924,487	846,686
Goodwill	278,297	278,297
Operating lease right-of-use assets, net of accumulated amortization	185,989	55,982
Other deferred charges	192,286	157,497
Total deferred charges and other assets	1,581,059	1,338,462
Assets	10,050,841	9,257,377
Current Liabilities:
Short-term debt	405,500	232,000
Current installments of long-term debt	502,434	184,793
Accounts payable	157,035	215,708
Customer deposits	6,259	6,117
Accrued interest and taxes	86,001	76,783
Regulatory liabilities	122,895	17,002
Operating lease liabilities	11,983	18,781
Dividends declared	31,676	31,676
Transmission interconnection arrangement liabilities	65,063	20,473
Other current liabilities	89,727	87,037
Total current liabilities	1,478,573	890,370
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs	3,902,687	3,892,594
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	859,173	822,831
Regulatory liabilities	764,360	755,202
Asset retirement obligations	228,343	223,377
Accrued pension liability and postretirement benefit cost	27,748	32,799
Operating lease liabilities	168,849	41,336
Other deferred credits	323,195	342,413
Total deferred credits and liabilities	2,371,668	2,217,958
Total liabilities	7,752,928	7,000,922
Commitments and Contingencies (Note 11)
Cumulative Preferred Stock without mandatory redemption requirements ($100 stated value; 10,000,000 shares authorized; issued and outstanding 115,293 shares)	11,529	11,529
PNM common stockholder’s equity:
Common stock (no par value; 40,000,000 shares authorized; issued and outstanding 39,117,799 shares)	1,425,342	1,429,102
Accumulated other comprehensive income (loss), net of income taxes	(62,420)	(66,048)
Retained earnings	872,289	828,878
Total PNM common stockholder’s equity	2,235,211	2,191,932
Non-controlling interest in Valencia	51,173	52,994
Total equity	2,286,384	2,244,926
Total liabilities and stockholders' equity	10,050,841	9,257,377
PNM
Current Assets:
Cash and cash equivalents	4,162	2,985
Accounts receivable, net of allowance for credit losses	130,997	151,386
Unbilled revenues	47,317	45,282
Materials, supplies, and fuel stock	68,191	55,890
Regulatory assets	99,230	18,333
Prepaid assets	12,628	10,085
Income taxes receivable	18,233	18,233
Other current assets	2,094	20,706
Total current assets	414,625	345,645
Other Property and Investments:
Investment securities	421,377	417,476
Other investments	70	76
Non-utility property, net	14,335	11,695
Total other property and investments	435,782	429,247
Utility Plant:
Plant in service, held for future use, and to be abandoned	6,047,974	6,007,464
Less accumulated depreciation and amortization	1,953,246	1,908,644
Net plant in service and plant held for future use	4,094,728	4,098,820
Construction work in progress	472,864	300,772
Nuclear fuel, net of accumulated amortization of $34,759 and $43,985	77,368	95,223
Net utility plant	4,644,960	4,494,815
Deferred Charges and Other Assets:
Regulatory assets	846,107	763,941
Goodwill	51,632	51,632
Operating lease right-of-use assets, net of accumulated amortization	183,889	52,556
Other deferred charges	154,857	134,330
Total deferred charges and other assets	1,236,485	1,002,459
Assets	6,731,852	6,272,166
Current Liabilities:
Short-term debt	166,900	185,900
Current installments of long-term debt	422,513	184,793
Customer deposits	6,259	6,117
Accrued interest and taxes	47,389	35,797
Regulatory liabilities	120,833	7,913
Operating lease liabilities	10,992	17,239
Dividends declared	132	132
Transmission interconnection arrangement liabilities	65,063	20,473
Other current liabilities	54,491	55,350
Total current liabilities	1,028,881	692,155
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs	1,722,687	1,816,107
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	710,092	682,040
Regulatory liabilities	551,747	556,989
Asset retirement obligations	227,463	222,549
Accrued pension liability and postretirement benefit cost	27,208	32,007
Operating lease liabilities	167,891	39,633
Other deferred credits	230,550	258,833
Total deferred credits and liabilities	1,914,951	1,792,051
Total liabilities	4,666,519	4,300,313
Commitments and Contingencies (Note 11)
Cumulative Preferred Stock without mandatory redemption requirements ($100 stated value; 10,000,000 shares authorized; issued and outstanding 115,293 shares)	11,529	11,529
PNM common stockholder’s equity:
Common stock (no par value; 40,000,000 shares authorized; issued and outstanding 39,117,799 shares)	1,547,918	1,547,918
Accumulated other comprehensive income (loss), net of income taxes	(72,870)	(74,335)
Retained earnings	527,583	433,747
Total PNM common stockholder’s equity	2,002,631	1,907,330
Non-controlling interest in Valencia	51,173	52,994
Total equity	2,053,804	1,960,324
Total liabilities and stockholders' equity	6,731,852	6,272,166
PNM | Nonrelated Party
Current Assets:
Other receivables	22,508	13,877
Current Liabilities:
Accounts payable	121,612	163,522
PNM | Related Party
Current Assets:
Other receivables	9,265	8,868
Current Liabilities:
Accounts payable	$ 12,697	$ 14,919