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Condensed Consolidated Balance Sheets - TNMP - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Current Assets:    
Cash and cash equivalents $ 32,066 $ 4,498
Accounts receivable 190,913 130,351
Unbilled revenues 82,440 69,176
Other receivables 42,256 37,236
Materials and supplies 172,986 166,861
Regulatory assets 29,157 41,492
Total current assets 595,436 498,836
Other Property and Investments:    
Other investments 268 259
Non-utility property, net 36,678 28,832
Total other property and investments 530,841 504,615
Utility Plant:    
Plant in service and plant held for future use 11,109,319 10,697,774
Less accumulated depreciation and amortization 2,966,615 2,829,296
Net plant in service and plant held for future use 8,142,704 7,868,478
Construction work in progress 791,841 495,976
Net utility plant 9,010,268 8,437,008
Deferred Charges and Other Assets:    
Regulatory assets 953,075 962,003
Goodwill 278,297 278,297
Operating lease right-of-use assets, net of accumulated amortization 320,127 272,894
Other deferred charges 283,490 258,080
Total deferred charges and other assets 1,834,989 1,771,274
Total assets 11,971,534 11,211,733
Current Liabilities:    
Short-term debt 313,800 609,300
Accounts payable 154,416 204,468
Accrued interest and taxes 134,484 104,756
Regulatory liabilities 23,708 34,173
Operating lease liabilities 15,366 14,293
Other current liabilities 82,373 84,998
Total current liabilities 1,176,220 1,775,098
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs 4,680,365 4,311,765
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes 945,750 899,392
Regulatory liabilities 760,536 748,738
Asset retirement obligations 248,461 244,618
Accrued pension liability and postretirement benefit cost 15,696 23,065
Operating lease liabilities 300,165 255,376
Other deferred credits 371,467 358,867
Total deferred credits and other liabilities 2,642,075 2,530,056
Total liabilities 8,498,660 8,616,919
Commitments and Contingencies (Note 11)
Common Stockholder’s Equity:    
Common stock ($10 par value; 12,000,000 shares authorized; issued and outstanding 6,358 shares) 2,565,578 1,724,444
Retained earnings 924,214 887,649
Total TXNM common stockholders’ equity 3,416,038 2,536,385
Total liabilities and stockholders' equity 11,971,534 11,211,733
Texas-New Mexico Power Company    
Current Assets:    
Cash and cash equivalents 21,752 233
Unbilled revenues 22,912 16,193
Other receivables 21,104 15,144
Materials and supplies 30,590 24,351
Regulatory assets 0 5,268
Prepaid and other current assets 7,543 4,908
Total current assets 154,885 100,516
Other Property and Investments:    
Other investments 0 75
Non-utility property, net 19,139 13,137
Total other property and investments 19,139 13,212
Utility Plant:    
Plant in service and plant held for future use 3,862,646 3,635,550
Less accumulated depreciation and amortization 667,789 616,741
Net plant in service and plant held for future use 3,194,857 3,018,809
Construction work in progress 286,455 165,527
Net utility plant 3,481,312 3,184,336
Deferred Charges and Other Assets:    
Regulatory assets 113,984 104,693
Goodwill 226,665 226,665
Operating lease right-of-use assets, net of accumulated amortization 191 923
Other deferred charges 17,265 18,780
Total deferred charges and other assets 358,105 351,061
Total assets 4,013,441 3,649,125
Current Liabilities:    
Short-term debt 0 151,600
Accrued interest and taxes 62,498 56,740
Regulatory liabilities 2,556 602
Operating lease liabilities 162 713
Other current liabilities 18,186 6,964
Total current liabilities 122,300 291,074
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs 1,602,738 1,464,079
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes 222,165 208,107
Regulatory liabilities 260,581 230,037
Asset retirement obligations 1,015 955
Accrued pension liability and postretirement benefit cost 408 998
Operating lease liabilities 27 167
Other deferred credits 104,637 88,519
Total deferred credits and other liabilities 588,833 528,783
Total liabilities 2,313,871 2,283,936
Commitments and Contingencies (Note 11)
Common Stockholder’s Equity:    
Common stock ($10 par value; 12,000,000 shares authorized; issued and outstanding 6,358 shares) 64 64
Paid-in-capital 1,120,066 870,066
Retained earnings 579,440 495,059
Total TXNM common stockholders’ equity 1,699,570 1,365,189
Total liabilities and stockholders' equity 4,013,441 3,649,125
Texas-New Mexico Power Company | Nonrelated Party    
Current Assets:    
Accounts receivable 50,984 34,419
Current Liabilities:    
Accounts payable 32,582 67,116
Texas-New Mexico Power Company | Related Party    
Current Liabilities:    
Accounts payable $ 6,316 $ 7,339