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Lease Commitments - Components of Lease Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Lease, Cost [Line Items] |  |  |  |
Operating lease cost: | $ 4,346 | $ 7,205 | $ 11,552 | $ 21,623
Amounts capitalized | (373) | (577) | (1,365) | (1,860)
Total operating lease expense | 3,973 | 6,628 | 10,187 | 19,763
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 2,389 | 1,585 | 6,718 | 4,680
Interest on lease liabilities | 274 | 170 | 760 | 471
Amounts capitalized | (1,915) | (1,417) | (5,389) | (3,957)
Total financing lease expense | 748 | 338 | 2,089 | 1,194
Variable lease expense | 360 | 262 | 982 | 629
Short-term lease expense | 190 | 567 | 490 | 2,884
Total lease expense for the period | 5,271 | 7,795 | 13,748 | 24,470
Cooling Towers |  |  |  |
Financing lease cost: |  |  |  |
Short-term lease expense |  | 400 |  | 2,700
Increase reimbursements |  | 400 |  | 2,700
PNM |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost: | 4,001 | 6,736 | 10,377 | 20,085
Amounts capitalized | (71) | (166) | (334) | (524)
Total operating lease expense | 3,930 | 6,570 | 10,043 | 19,561
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 1,193 | 792 | 3,325 | 2,293
Interest on lease liabilities | 148 | 84 | 411 | 231
Amounts capitalized | (844) | (588) | (2,313) | (1,648)
Total financing lease expense | 497 | 288 | 1,423 | 876
Variable lease expense | 360 | 262 | 982 | 629
Short-term lease expense | 174 | 568 | 438 | 2,837
Total lease expense for the period | 4,961 | 7,688 | 12,886 | 23,903
TNMP |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost: | 345 | 466 | 1,175 | 1,489
Amounts capitalized | (302) | (410) | (1,031) | (1,336)
Total operating lease expense | 43 | 56 | 144 | 153
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 1,183 | 779 | 3,345 | 2,334
Interest on lease liabilities | 126 | 85 | 349 | 238
Amounts capitalized | (1,071) | (829) | (3,076) | (2,309)
Total financing lease expense | 238 | 35 | 618 | 263
Variable lease expense | 0 | 0 | 0 | 0
Short-term lease expense | 7 | 1 | 22 | 4
Total lease expense for the period | $ 288 | $ 92 | $ 784 | $ 420

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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