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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Taxes [Line Items] |  |  |
Current federal income tax | $ 0 | $ 0 | $ 60
Current state income tax | 1,835 | 231 | 43
Deferred federal income tax (benefit) | 20,679 | 17,574 | (20,372)
Deferred state income tax (benefit) | 11,315 | 3,721 | (4,491)
Amortization of accumulated investment tax credits | (1,247) | (890) | (522)
Total income taxes (benefit) | 32,582 | 20,636 | (25,282)
Public Service Company of New Mexico |  |  |
Income Taxes [Line Items] |  |  |
Current federal income tax | 0 | 0 | (6,266)
Current state income tax | (128) | (585) | 449
Deferred federal income tax (benefit) | 18,774 | 20,125 | (12,308)
Deferred state income tax (benefit) | 8,583 | 2,560 | (7,590)
Amortization of accumulated investment tax credits | (237) | (243) | (247)
Total income taxes (benefit) | 26,992 | 21,857 | (25,962)
Texas-New Mexico Power Company |  |  |
Income Taxes [Line Items] |  |  |
Current federal income tax | 5,770 | 12,048 | 10,792
Current state income tax | 2,395 | 2,033 | 1,904
Deferred federal income tax (benefit) | (224) | (7,744) | (7,621)
Deferred state income tax (benefit) | (29) | (29) | (29)
Total income taxes (benefit) | $ 7,912 | $ 6,308 | $ 5,046

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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(1)(Note 1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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