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Condensed Consolidated Balance Sheets - TXNM - USD ($)
$ in Thousands
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Current Assets:            
Cash and cash equivalents $ 22,170   $ 4,498      
Accounts receivable, net of allowance for credit losses of $1,319 and $1,398 146,444   130,351      
Unbilled revenues 81,989   69,176      
Other receivables 46,981   37,236      
Materials, supplies, and fuel stock 171,174   166,861      
Regulatory assets 41,891   41,492      
Prepaid assets 39,869   25,452      
Income taxes receivable 9,486   7,684      
Other current assets 13,723   16,086      
Total current assets 573,727   498,836      
Other Property and Investments:            
Investment securities 487,033   475,524      
Other investments 246   259      
Non-utility property, net 32,218   28,832      
Total other property and investments 519,497   504,615      
Utility Plant:            
Plant in service and plant held for future use 10,965,483   10,697,774      
Less accumulated depreciation and amortization 2,904,763   2,829,296      
Net plant in service and plant held for future use 8,060,720   7,868,478      
Construction work in progress 677,897   495,976      
Nuclear fuel, net of accumulated amortization of $32,051 and $28,245 76,887   72,554      
Net utility plant 8,815,504   8,437,008      
Deferred Charges and Other Assets:            
Regulatory assets 953,795   962,003      
Goodwill 278,297   278,297 $ 278,297    
Operating lease right-of-use assets, net of accumulated amortization 265,919   272,894      
Other deferred charges 268,525   258,080      
Total deferred charges and other assets 1,766,536   1,771,274      
Total assets 11,675,264   11,211,733 10,583,410    
Current Liabilities:            
Short-term debt 345,700   609,300      
Current installments of long-term debt (includes $7,102 and $6,907 related to ETBC I) 416,701   611,603      
Accounts payable 147,646   204,468      
Customer deposits 6,509   6,533      
Accrued interest and taxes 86,970   104,756      
Regulatory liabilities 21,787   34,173      
Operating lease liabilities 13,640   14,293      
Dividends declared 132   36,889      
Transmission interconnection arrangement liabilities 0   68,085      
Other current liabilities 81,313   84,998      
Total current liabilities 1,120,398   1,775,098      
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs (includes $328,179 and $331,726 related to ETBC I) 4,782,536   4,311,765      
Deferred Credits and Other Liabilities:            
Accumulated deferred income taxes 918,217   899,392      
Regulatory liabilities 751,467   748,738      
Asset retirement obligations 246,647   244,618      
Accrued pension liability and postretirement benefit cost 18,211   23,065      
Operating lease liabilities 245,847   255,376      
Other deferred credits 363,618   358,867      
Total deferred credits and other liabilities 2,544,007   2,530,056      
Total liabilities 8,446,941   8,616,919      
Commitments and Contingencies (Note 11)        
Cumulative Preferred Stock of Subsidiary without mandatory redemption requirements ($100 stated value; 10,000,000 shares authorized; issued and outstanding 115,293 shares) 11,529   11,529      
TXNM common stockholders’ equity:            
Common stock (no par value; 200,000,000 shares authorized; issued and outstanding 105,378,979 and 92,659,335 shares) 2,366,770   1,724,444      
Accumulated other comprehensive income (loss), net of income taxes (75,393)   (75,708)      
Retained earnings 879,388   887,649      
Total TXNM common stockholders’ equity 3,170,765   2,536,385      
Non-controlling interest in Valencia 46,029   46,900      
Total equity 3,216,794 $ 2,550,707 2,583,285 $ 2,451,680 $ 2,404,730 $ 2,399,051
Total liabilities and stockholders' equity $ 11,675,264   $ 11,211,733