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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, 2020   $ 825,678 $ 64 $ 685,166 $ 140,448
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   52,326     52,326
Equity contribution from parent   52,000   52,000  
Ending balance TNMP at Sep. 30, 2021   930,004 64 737,166 192,774
Beginning balance TNMP at Jun. 30, 2021   902,063 64 737,166 164,833
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   27,941     27,941
Ending balance TNMP at Sep. 30, 2021   930,004 64 737,166 192,774
Beginning balance TNMP at Dec. 31, 2021 $ 2,167,524 941,557 64 737,166 204,327
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   72,542     72,542
Equity contribution from parent   68,000   68,000  
Ending balance TNMP at Sep. 30, 2022 2,201,881 1,082,099 64 805,166 276,869
Beginning balance TNMP at Jun. 30, 2022   982,668 64 737,166 245,438
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net earnings   31,431     31,431
Equity contribution from parent   68,000   68,000  
Ending balance TNMP at Sep. 30, 2022 $ 2,201,881 $ 1,082,099 $ 64 $ 805,166 $ 276,869