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Lease Commitments - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Lease, Cost [Line Items] |  |  |  |
Amounts capitalized | $ (117) | $ (237) | $ (258) | $ (505)
Total operating lease expense | 6,979 | 4,867 | 13,957 | 9,874
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 2,864 | 2,463 | 5,452 | 5,005
Interest on lease liabilities | 411 | 294 | 750 | 591
Amounts capitalized | (2,354) | (1,917) | (4,428) | (3,940)
Total financing lease expense | 921 | 840 | 1,774 | 1,656
Variable lease expense | 6,579 | 433 | 13,135 | 793
Short-term lease expense | 198 | 165 | 423 | 381
Total lease expense for the period | 14,677 | 6,305 | 29,289 | 12,704
Energy storage leases |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost | 5,084 | 2,947 | 10,167 | 5,893
Other operating leases |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost | 2,012 | 2,157 | 4,048 | 4,486
PNM |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Amounts capitalized | (11) | (28) | (22) | (63)
Total operating lease expense | 6,936 | 4,827 | 13,871 | 9,797
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 1,230 | 1,120 | 2,431 | 2,337
Interest on lease liabilities | 184 | 143 | 364 | 287
Amounts capitalized | (898) | (756) | (1,778) | (1,597)
Total financing lease expense | 516 | 507 | 1,017 | 1,027
Variable lease expense | 6,579 | 433 | 13,135 | 793
Short-term lease expense | 178 | 148 | 369 | 352
Total lease expense for the period | 14,209 | 5,915 | 28,392 | 11,969
PNM | Energy storage leases |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost | 5,084 | 2,947 | 10,167 | 5,893
PNM | Other operating leases |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost | 1,863 | 1,908 | 3,726 | 3,967
TNMP |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Amounts capitalized | (106) | (209) | (236) | (442)
Total operating lease expense | 25 | 28 | 49 | 65
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 1,549 | 1,315 | 2,843 | 2,631
Interest on lease liabilities | 213 | 147 | 357 | 299
Amounts capitalized | (1,455) | (1,161) | (2,650) | (2,343)
Total financing lease expense | 307 | 301 | 550 | 587
Variable lease expense | 0 | 0 | 0 | 0
Short-term lease expense | 8 | 7 | 12 | 12
Total lease expense for the period | 340 | 336 | 611 | 664
TNMP | Energy storage leases |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost | 0 | 0 | 0 | 0
TNMP | Other operating leases |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost | $ 131 | $ 237 | $ 285 | $ 507

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