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Schedule I - Condensed Financial Information of Parent Company - Balance Sheets Additional Information (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
PNM Resources |  |
Condensed Financial Statements, Captions [Line Items] |  |
Accumulated depreciation | $ 19,650 | $ 18,810

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