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Lease Commitments - Components of Lease Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | $ 29,270 | $ 30,418
Amounts capitalized | (2,951) | (3,395)
Total operating lease expense | 26,319 | 27,023
Financing lease cost: |  |
Amortization of right-of-use assets | 5,277 | 3,412
Interest on lease liabilities | 574 | 511
Amounts capitalized | (4,404) | (2,810)
Total financing lease expense | 1,447 | 1,113
Variable lease expense | 380 | 221
Short-term lease expense (1) | 3,035 | 295
Total lease expense for the period | 31,181 | 28,652
Cooling Towers |  |
Financing lease cost: |  |
Short-term lease expense (1) | 2,500 |
Insurance settlements receivable | 1,800 |
Public Service Company of New Mexico |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | 26,690 | 27,302
Amounts capitalized | (836) | (1,020)
Total operating lease expense | 25,854 | 26,282
Financing lease cost: |  |
Amortization of right-of-use assets | 2,507 | 1,563
Interest on lease liabilities | 263 | 221
Amounts capitalized | (1,726) | (1,056)
Total financing lease expense | 1,044 | 728
Variable lease expense | 380 | 221
Short-term lease expense (1) | 2,972 | 288
Total lease expense for the period | 30,250 | 27,519
Texas-New Mexico Power Company |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | 2,445 | 2,870
Amounts capitalized | (2,115) | (2,375)
Total operating lease expense | 330 | 495
Financing lease cost: |  |
Amortization of right-of-use assets | 2,682 | 1,775
Interest on lease liabilities | 307 | 285
Amounts capitalized | (2,678) | (1,754)
Total financing lease expense | 311 | 306
Variable lease expense | 0 | 0
Short-term lease expense (1) | 6 | 5
Total lease expense for the period | $ 647 | $ 806

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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 http://asc.fasb.org/extlink&oid=123408670&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 http://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 http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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- Definition Amount of amortization expense attributable to right-of-use asset from finance lease. + 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 http://asc.fasb.org/extlink&oid=123408670&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 http://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 http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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- Definition The increase (decrease) during the reporting period in insurance settlements receivable, which are amounts due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. The expectation is that such reimbursement will be received within one year of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + 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 http://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 http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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