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Lease Commitments - Components of Lease Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Lease, Cost [Line Items] |  |  |  |
Operating lease cost: | $ 7,205 | $ 7,192 | $ 21,623 | $ 22,006
Amounts capitalized | (577) | (716) | (1,860) | (2,264)
Total operating lease expense | 6,628 | 6,476 | 19,763 | 19,742
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 1,585 | 1,372 | 4,680 | 3,802
Interest on lease liabilities | 170 | 145 | 471 | 426
Amounts capitalized | (1,417) | (1,161) | (3,957) | (3,202)
Total financing lease expense | 338 | 356 | 1,194 | 1,026
Variable lease expense | 262 | 106 | 629 | 274
Short-term lease expense | 567 | 1,578 | 2,884 | 1,857
Total lease expense for the period | 7,795 | 8,516 | 24,470 | 22,899
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: | 6,736 | 6,569 | 20,085 | 20,020
Amounts capitalized | (166) | (199) | (524) | (645)
Total operating lease expense | 6,570 | 6,370 | 19,561 | 19,375
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 792 | 657 | 2,293 | 1,793
Interest on lease liabilities | 84 | 66 | 231 | 193
Amounts capitalized | (588) | (452) | (1,648) | (1,235)
Total financing lease expense | 288 | 271 | 876 | 751
Variable lease expense | 262 | 106 | 629 | 274
Short-term lease expense | 568 | 1,572 | 2,837 | 1,821
Total lease expense for the period | 7,688 | 8,319 | 23,903 | 22,221
TNMP |  |  |  |
Lease, Cost [Line Items] |  |  |  |
Operating lease cost: | 466 | 594 | 1,489 | 1,880
Amounts capitalized | (410) | (517) | (1,336) | (1,618)
Total operating lease expense | 56 | 77 | 153 | 262
Financing lease cost: |  |  |  |
Amortization of right-of-use assets | 779 | 693 | 2,334 | 1,944
Interest on lease liabilities | 85 | 78 | 238 | 230
Amounts capitalized | (829) | (709) | (2,309) | (1,967)
Total financing lease expense | 35 | 62 | 263 | 207
Variable lease expense | 0 | 0 | 0 | 0
Short-term lease expense | 1 | 2 | 4 | 6
Total lease expense for the period | $ 92 | $ 141 | $ 420 | $ 475

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
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