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Segment Information - Schedule of Gross Margin (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Segment Reporting Information [Line Items] |  |
Gross margin | $ 175,928 | $ 186,711
Transmission and distribution costs | 22,764 | 22,196
Depreciation and amortization | 83,669 | 71,126
Utility margin | 304,573 | 302,391
Energy Production |  |
Segment Reporting Information [Line Items] |  |
Energy production costs | 22,212 | 22,358
Public Service Company of New Mexico |  |
Segment Reporting Information [Line Items] |  |
Gross margin | 120,854 | 140,381
Transmission and distribution costs | 14,350 | 13,887
Depreciation and amortization | 53,287 | 43,686
Utility margin | 210,703 | 220,312
Public Service Company of New Mexico | Energy Production |  |
Segment Reporting Information [Line Items] |  |
Energy production costs | 22,212 | 22,358
Texas-New Mexico Power Company |  |
Segment Reporting Information [Line Items] |  |
Gross margin | 55,074 | 46,330
Transmission and distribution costs | 8,414 | 8,309
Depreciation and amortization | 30,382 | 27,440
Utility margin | 93,870 | 82,079
Texas-New Mexico Power Company | Energy Production |  |
Segment Reporting Information [Line Items] |  |
Energy production costs | 0 | 0
Corporate and Other |  |
Segment Reporting Information [Line Items] |  |
Gross margin | 0 | 0
Transmission and distribution costs | 0 | 0
Depreciation and amortization | 0 | 0
Utility margin | 0 | 0
Corporate and Other | Energy Production |  |
Segment Reporting Information [Line Items] |  |
Energy production costs | $ 0 | $ 0

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