Consolidated Balance Sheets - TNMP - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 2,215	$ 4,078
Accounts receivable	126,291	183,669
Unbilled revenues	64,072	63,473
Other receivables	76,509	20,320
Materials, supplies, and fuel stock	98,034	66,733
Regulatory assets	73,046	20,265
Other current assets	8,920	31,624
Total current assets	475,543	410,978
Other Property and Investments:
Other investments	171	177
Non-utility property, including financing leases	29,367	26,841
Total other property and investments	593,516	535,114
Utility Plant:
Plant in service, held for future use, and to be abandoned	9,701,180	9,164,564
Less accumulated depreciation and amortization	2,755,823	2,659,952
Net plant in service and plant held for future use	6,945,357	6,504,612
Construction work in progress	589,834	372,988
Net utility plant	7,609,862	6,972,823
Deferred Charges and Other Assets:
Regulatory assets	914,381	846,686
Goodwill	278,297	278,297
Operating lease assets, net of amortization	182,201	55,982
Other deferred charges	198,805	157,497
Total deferred charges and other assets	1,573,684	1,338,462
Total assets	10,252,605	9,257,377
Current Liabilities:
Short-term debt	261,900	232,000
Current maturities of long-term debt	280,169	184,793
Accounts payable	205,175	215,708
Accrued interest and taxes	98,655	76,783
Regulatory liabilities	140,005	17,002
Operating lease liabilities	12,267	18,781
Other current liabilities	94,397	87,037
Total current liabilities	1,230,760	890,370
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs (includes $338,521 and $0 related to ETBC I)	4,241,642	3,892,594
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	845,280	822,831
Regulatory liabilities	771,317	755,202
Asset retirement obligations	245,531	223,377
Accrued pension liability and postretirement benefit cost	21,429	32,799
Operating lease liabilities	167,000	41,336
Other deferred credits	319,066	342,413
Total deferred credits and other liabilities	2,369,623	2,217,958
Total liabilities	7,842,025	7,000,922
Commitments and Contingencies (See Note 16)
Company common stockholders’ equity:
Common stock (no par value; 120,000,000 shares authorized; issued and outstanding 90,200,384 and 85,834,874 shares)	1,624,823	1,429,102
Retained earnings	787,110	828,878
Total PNMR common stockholders’ equity	2,349,093	2,191,932
Total liabilities and stockholders' equity	10,252,605	9,257,377
TNMP
Current Assets:
Cash and cash equivalents	0	0
Accounts receivable	31,412	32,283
Unbilled revenues	17,147	18,191
Other receivables	26,983	8,552
Materials, supplies, and fuel stock	16,462	10,843
Regulatory assets	50	1,932
Other current assets	2,705	2,346
Total current assets	94,759	74,147
Other Property and Investments:
Other investments	102	101
Non-utility property, including financing leases	14,746	14,010
Total other property and investments	14,848	14,111
Utility Plant:
Plant in service, held for future use, and to be abandoned	3,210,870	2,853,130
Less accumulated depreciation and amortization	582,140	578,157
Net plant in service and plant held for future use	2,628,730	2,274,973
Construction work in progress	91,274	63,820
Net utility plant	2,720,004	2,338,793
Deferred Charges and Other Assets:
Regulatory assets	75,654	82,745
Goodwill	226,665	226,665
Operating lease assets, net of amortization	1,814	3,426
Other deferred charges	11,287	6,714
Total deferred charges and other assets	315,420	319,550
Total assets	3,145,031	2,746,601
Current Liabilities:
Short-term debt	55,100	36,700
Current maturities of long-term debt	79,947	0
Accrued interest and taxes	57,558	54,672
Regulatory liabilities	5,159	9,089
Operating lease liabilities	895	1,543
Other current liabilities	12,084	6,336
Total current liabilities	269,295	148,765
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs (includes $338,521 and $0 related to ETBC I)	1,180,933	1,076,875
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	178,748	164,637
Regulatory liabilities	206,296	198,213
Asset retirement obligations	898	828
Accrued pension liability and postretirement benefit cost	1,480	792
Operating lease liabilities	809	1,703
Other deferred credits	68,911	52,964
Total deferred credits and other liabilities	457,142	419,137
Total liabilities	1,907,370	1,644,777
Commitments and Contingencies (See Note 16)
Company common stockholders’ equity:
Common stock (no par value; 120,000,000 shares authorized; issued and outstanding 90,200,384 and 85,834,874 shares)	64	64
Paid-in-capital	846,066	805,166
Retained earnings	391,531	296,594
Total PNMR common stockholders’ equity	1,237,661	1,101,824
Total liabilities and stockholders' equity	3,145,031	2,746,601
TNMP | Nonrelated Party
Current Liabilities:
Accounts payable	51,620	34,152
TNMP | Related Party
Current Liabilities:
Accounts payable	$ 6,932	$ 6,273