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Related Party Transactions
 6 Months Ended
Jun. 30, 2025
Related Party Transactions [Abstract]  
Related Party Transactions Related Party Transactions
TXNM, PNM, TNMP, and NMRD are considered related parties, as is PNMR Services Company, a wholly-owned subsidiary of TXNM that provides corporate services to TXNM and its subsidiaries in accordance with shared services agreements. These services are billed at cost on a monthly basis to the business units. In addition, prior to the sale of NMRD, PNM purchased renewable energy from certain NMRD-owned facilities at a fixed price per MWh of energy produced. On February 27, 2024, PNMR Development and AEP OnSite Partners sold their respective interests in NMRD and the table below reflects transactions with NMRD prior to the sale. The table below summarizes the nature and amount of related party transactions of TXNM, PNM, TNMP, and NMRD:
Three Months EndedSix Months Ended
June 30,June 30,
2025202420252024
(In thousands)
Services billings:
TXNM to PNM
$35,317 $31,023 $67,404 $66,430 
TXNM to TNMP
14,109 12,885 27,485 27,121 
PNM to TNMP86 109 165 190 
TNMP to TXNM
28 — 56 10 
TXNM to NMRD
— — — 66 
Renewable energy purchases:
PNM from NMRD— — — 1,523 
Interest billings:
TXNM to PNM
76 25 84 39 
PNM to TXNM
132 154 265 309 
TXNM to TNMP
41 22 186 179