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Lease Commitments - Components of Lease Expense (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($)
Lease, Cost [Line Items] |
Total operating lease expense | $ 7,611
Financing lease expense: |
Amortization of right-of-use assets | 125
Interest on lease liabilities | 32
Total financing lease expense | 157
Variable lease expense | 0
Short-term lease expense | 94
Total lease expense for the period | 7,862
PNM |
Lease, Cost [Line Items] |
Total operating lease expense | 7,231
Financing lease expense: |
Amortization of right-of-use assets | 66
Interest on lease liabilities | 16
Total financing lease expense | 82
Variable lease expense | 0
Short-term lease expense | 74
Total lease expense for the period | 7,387
TNMP |
Lease, Cost [Line Items] |
Total operating lease expense | 241
Financing lease expense: |
Amortization of right-of-use assets | 58
Interest on lease liabilities | 17
Total financing lease expense | 75
Variable lease expense | 0
Short-term lease expense | 3
Total lease expense for the period | $ 319

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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=77888426&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=77888419&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=77888399&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 http://asc.fasb.org/extlink&oid=77888399&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=77888426&loc=SL77918686-209980 + Details
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