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Condensed Consolidated Balance Sheets - TXNM - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Current Assets:        
Cash and cash equivalents $ 6,053 $ 4,498    
Accounts receivable, net of allowance for credit losses of $1,353 and $1,398 132,378 130,351    
Unbilled revenues 57,689 69,176    
Other receivables 42,381 37,236    
Materials, supplies, and fuel stock 168,244 166,861    
Regulatory assets 40,897 41,492    
Prepaid assets 26,286 25,452    
Income taxes receivable 7,284 7,684    
Other current assets 8,194 16,086    
Total current assets 489,406 498,836    
Other Property and Investments:        
Investment securities 470,179 475,524    
Other investments 290 259    
Non-utility property, net 28,686 28,832    
Total other property and investments 499,155 504,615    
Utility Plant:        
Plant in service and plant held for future use 10,800,198 10,697,774    
Less accumulated depreciation and amortization 2,889,262 2,829,296    
Net plant in service and plant held for future use 7,910,936 7,868,478    
Construction work in progress 637,262 495,976    
Nuclear fuel, net of accumulated amortization of $32,015 and $28,245 74,729 72,554    
Net utility plant 8,622,927 8,437,008    
Deferred Charges and Other Assets:        
Regulatory assets 957,305 962,003    
Goodwill 278,297 278,297 $ 278,297  
Operating lease right-of-use assets, net of accumulated amortization 269,399 272,894    
Other deferred charges 274,131 258,080    
Total deferred charges and other assets 1,779,132 1,771,274    
Total assets 11,390,620 11,211,733 10,257,653  
Current Liabilities:        
Short-term debt 593,700 609,300    
Current installments of long-term debt (includes $7,102 and $6,907 related to ETBC I) 671,858 611,603    
Accounts payable 163,132 204,468    
Customer deposits 6,556 6,533    
Accrued interest and taxes 102,947 104,756    
Regulatory liabilities 32,207 34,173    
Operating lease liabilities 14,523 14,293    
Dividends declared 37,891 36,889    
Transmission interconnection arrangement liabilities 0 68,085    
Other current liabilities 71,361 84,998    
Total current liabilities 1,694,175 1,775,098    
Long-term Debt, net of Unamortized Premiums, Discounts, and Debt Issuance Costs (includes $328,152 and $331,726 related to ETBC I) 4,582,713 4,311,765    
Deferred Credits and Other Liabilities:        
Accumulated deferred income taxes 909,777 899,392    
Regulatory liabilities 752,884 748,738    
Asset retirement obligations 246,208 244,618    
Accrued pension liability and postretirement benefit cost 20,559 23,065    
Operating lease liabilities 253,493 255,376    
Other deferred credits 368,575 358,867    
Total deferred credits and other liabilities 2,551,496 2,530,056    
Total liabilities 8,828,384 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 92,659,335 shares) 1,721,109 1,724,444    
Accumulated other comprehensive income (loss), net of income taxes (74,586) (75,708)    
Retained earnings 857,812 887,649    
Total TXNM common stockholders’ equity 2,504,335 2,536,385    
Non-controlling interest in Valencia 46,372 46,900    
Total equity 2,550,707 2,583,285 $ 2,404,730 $ 2,399,051
Total liabilities and stockholders' equity $ 11,390,620 $ 11,211,733