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Condensed Consolidated Statements of Changes in Common Stockholder's Equity - TNMP - USD ($)
$ in Thousands
Total
Texas-New Mexico Power Company
Texas-New Mexico Power Company
Common Stock
Texas-New Mexico Power Company
Paid-in Capital
Texas-New Mexico Power Company
Retained Earnings
Beginning balance TNMP at Dec. 31, 2023   $ 1,237,661 $ 64 $ 846,066 $ 391,531
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   44,508     44,508
Ending balance TNMP at Jun. 30, 2024   1,282,169 64 846,066 436,039
Beginning balance TNMP at Mar. 31, 2024   1,252,244 64 846,066 406,114
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   29,925     29,925
Ending balance TNMP at Jun. 30, 2024   1,282,169 64 846,066 436,039
Beginning balance TNMP at Dec. 31, 2024 $ 2,536,385 1,365,189 64 870,066 495,059
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   43,251     43,251
Equity contribution from parent   250,000   250,000  
Ending balance TNMP at Jun. 30, 2025 3,170,765 1,658,440 64 1,120,066 538,310
Beginning balance TNMP at Mar. 31, 2025   1,387,472 64 870,066 517,342
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   20,968     20,968
Equity contribution from parent   250,000   250,000  
Ending balance TNMP at Jun. 30, 2025 $ 3,170,765 $ 1,658,440 $ 64 $ 1,120,066 $ 538,310