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Lease Commitments - Components of Lease Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Lease, Cost [Line Items] |  |
Amounts capitalized | $ (141) | $ (267)
Total operating lease expense | 6,978 | 5,009
Financing lease cost: |  |
Amortization of right-of-use assets | 2,588 | 2,542
Interest on lease liabilities | 339 | 297
Amounts capitalized | (2,074) | (2,023)
Total financing lease expense | 853 | 816
Variable lease expense | 6,556 | 360
Short-term lease expense | 225 | 216
Total lease expense for the period | 14,612 | 6,401
Energy storage leases |  |
Lease, Cost [Line Items] |  |
Operating lease cost | 5,083 | 2,947
Other operating leases |  |
Lease, Cost [Line Items] |  |
Operating lease cost | 2,036 | 2,329
PNM |  |
Lease, Cost [Line Items] |  |
Amounts capitalized | (11) | (35)
Total operating lease expense | 6,935 | 4,971
Financing lease cost: |  |
Amortization of right-of-use assets | 1,201 | 1,218
Interest on lease liabilities | 180 | 144
Amounts capitalized | (880) | (841)
Total financing lease expense | 501 | 521
Variable lease expense | 6,556 | 360
Short-term lease expense | 191 | 204
Total lease expense for the period | 14,183 | 6,056
PNM | Energy storage leases |  |
Lease, Cost [Line Items] |  |
Operating lease cost | 5,083 | 2,947
PNM | Other operating leases |  |
Lease, Cost [Line Items] |  |
Operating lease cost | 1,863 | 2,059
TNMP |  |
Lease, Cost [Line Items] |  |
Amounts capitalized | (130) | (232)
Total operating lease expense | 24 | 38
Financing lease cost: |  |
Amortization of right-of-use assets | 1,294 | 1,316
Interest on lease liabilities | 144 | 152
Amounts capitalized | (1,195) | (1,182)
Total financing lease expense | 243 | 286
Variable lease expense | 0 | 0
Short-term lease expense | 4 | 6
Total lease expense for the period | 271 | 330
TNMP | Energy storage leases |  |
Lease, Cost [Line Items] |  |
Operating lease cost | 0 | 0
TNMP | Other operating leases |  |
Lease, Cost [Line Items] |  |
Operating lease cost | $ 154 | $ 270

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