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Lease Commitments - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Operating lease cost: |  |  |
Amounts capitalized | $ (894) | $ (1,672) | $ (2,417)
Other operating leases | 21,138 | 15,285 | 26,418
Financing lease cost: |  |  |
Amortization of right-of-use assets | 9,889 | 9,253 | 6,529
Interest on lease liabilities | 1,229 | 1,060 | 659
Amounts capitalized | (7,875) | (7,440) | (5,471)
Total financing lease expense | 3,243 | 2,873 | 1,717
Variable lease expense | 3,900 | 1,342 | 890
Short-term lease expense | 787 | 782 | 3,109
Total lease expense for the period | 29,068 | 20,282 | 32,134
Energy storage leases |  |  |
Operating lease cost: |  |  |
Operating lease cost | 13,353 | 4,351 |
Other operating leases |  |  |
Operating lease cost: |  |  |
Operating lease cost | 8,679 | 12,606 | 28,835
Cooling Towers |  |  |
Financing lease cost: |  |  |
Short-term lease expense |  |  | 2,700
Insurance settlements receivable |  |  | 2,700
PNM |  |  |
Operating lease cost: |  |  |
Amounts capitalized | (101) | (374) | (690)
Other operating leases | 20,974 | 15,104 | 26,074
Financing lease cost: |  |  |
Amortization of right-of-use assets | 4,554 | 4,566 | 3,175
Interest on lease liabilities | 603 | 562 | 327
Amounts capitalized | (3,227) | (3,190) | (2,264)
Total financing lease expense | 1,930 | 1,938 | 1,238
Variable lease expense | 3,900 | 1,342 | 890
Short-term lease expense | 714 | 675 | 3,058
Total lease expense for the period | 27,518 | 19,059 | 31,260
PNM | Energy storage leases |  |  |
Operating lease cost: |  |  |
Operating lease cost | 13,353 | 4,351 |
PNM | Other operating leases |  |  |
Operating lease cost: |  |  |
Operating lease cost | 7,722 | 11,127 | 26,764
TNMP |  |  |
Operating lease cost: |  |  |
Amounts capitalized | (793) | (1,298) | (1,728)
Other operating leases | 114 | 181 | 292
Financing lease cost: |  |  |
Amortization of right-of-use assets | 5,129 | 4,634 | 3,279
Interest on lease liabilities | 595 | 497 | 330
Amounts capitalized | (4,648) | (4,250) | (3,208)
Total financing lease expense | 1,076 | 881 | 401
Variable lease expense | 0 | 0 | 0
Short-term lease expense | 23 | 29 | 5
Total lease expense for the period | 1,213 | 1,091 | 698
TNMP | Energy storage leases |  |  |
Operating lease cost: |  |  |
Operating lease cost | 0 | 0 |
TNMP | Other operating leases |  |  |
Operating lease cost: |  |  |
Operating lease cost | $ 907 | $ 1,479 | $ 2,020

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