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Schedule II - Valuation and Qualifying Accounts (Details) - SEC Schedule, 12-09, Reserve, Allowance For Doubtful Accounts - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | $ 4,925 | $ 7,265 | $ 8,333
Charged to costs and expenses | 3,585 | 3,758 | 4,663
Charged to other accounts | 0 | 0 | 826
Write-offs and other | 5,122 | 6,098 | 6,557
Balance at end of year | 3,388 | 4,925 | 7,265
PNM |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 4,925 | 7,265 | 8,333
Charged to costs and expenses | 3,549 | 3,758 | 4,597
Charged to other accounts | 0 | 0 | 826
Write-offs and other | 5,086 | 6,098 | 6,491
Balance at end of year | 3,388 | 4,925 | 7,265
TNMP |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 0 | 0 | 0
Charged to costs and expenses | 36 | 0 | 66
Charged to other accounts | 0 | 0 | 0
Write-offs and other | 36 | 0 | 66
Balance at end of year | $ 0 | $ 0 | $ 0

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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