v3.26.3
Variable Interest Entities - Schedule of Impact on Balance Sheet (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Variable Interest Entity [Line Items]    
Current installments of long-term debt $ 127,721 $ 302,538
Regulatory liabilities - Current 12,993 11,022
Long-term Debt 5,632,794 5,116,026
Public Service Company of New Mexico    
Variable Interest Entity [Line Items]    
Current installments of long-term debt 127,721 302,538
Regulatory liabilities - Current 10,076 8,430
Long-term Debt 2,927,096 2,559,359
Valencia | Public Service Company of New Mexico    
Variable Interest Entity [Line Items]    
Securitized Cost (included in Regulatory assets - Deferred) 323,661 329,134
Current installments of long-term debt 7,721 7,303
Accrued interest and taxes 2,384 7,306
Regulatory liabilities - Current 2,514 3,009
Long-term Debt 316,892 324,531
Valencia | Public Service Company of New Mexico | Balance Sheet Location [Axis]: us-gaap:OtherAssetsCurrent    
Variable Interest Entity [Line Items]    
Restricted cash 4,222 11,954
Valencia | Public Service Company of New Mexico | Balance Sheet Location [Axis]: pnm:OtherDeferredCostsNetIncludingDeferredFinanceCosts    
Variable Interest Entity [Line Items]    
Restricted cash $ 1,729 $ 1,743