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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | SCHEDULE II PNM RESOURCES, INC. AND SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS
|  |  |  |  | Additions |  | Deductions |  |
| Description |  | Balance at beginning of year |  | Charged to costs and expenses |  | Charged to other accounts |  | Write-offs and other |  | Balance at end of year
|  |  |  |  | (In thousands) |  |
| Allowance for doubtful accounts, year ended December 31: |  |  |  |  |  |  |  |  |  |
| 2015 |  | $ | 1,466 |  |  | $ | 3,358 |  |  | $ | — |  |  | $ | 3,427 |  |  | $ | 1,397 |
| 2016 |  | $ | 1,397 |  |  | $ | 2,885 |  |  | $ | — |  |  | $ | 3,073 |  |  | $ | 1,209 |
| 2017 |  | $ | 1,209 |  |  | $ | 2,619 |  |  | $ | — |  |  | $ | 2,747 |  |  | $ | 1,081 |
SCHEDULE II PUBLIC SERVICE COMPANY OF NEW MEXICO AND SUBSIDIARY A WHOLLY-OWNED SUBSIDIARY OF PNM RESOURCES, INC. VALUATION AND QUALIFYING ACCOUNTS
|  |  |  |  | Additions |  | Deductions |  |
| Description |  | Balance at beginning of year |  | Charged to costs and expenses |  | Charged to other accounts |  | Write-offs |  | Balance at end of year
|  |  |  |  | (In thousands) |  |
| Allowance for doubtful accounts, year ended December 31: |  |  |  |  |  |  |  |  |  |
| 2015 |  | $ | 1,466 |  |  | $ | 3,344 |  |  | $ | — |  |  | $ | 3,413 |  |  | $ | 1,397 |
| 2016 |  | $ | 1,397 |  |  | $ | 2,871 |  |  | $ | — |  |  | $ | 3,059 |  |  | $ | 1,209 |
| 2017 |  | $ | 1,209 |  |  | $ | 2,615 |  |  | $ | — |  |  | $ | 2,743 |  |  | $ | 1,081 |
SCHEDULE II TEXAS-NEW MEXICO POWER COMPANY AND SUBSIDIARIES A WHOLLY-OWNED SUBSIDIARY OF PNM RESOURCES, INC. VALUATION AND QUALIFYING ACCOUNTS
|  |  |  | Additions |  | Deductions |  |
Description |  | Balance at beginning of year |  | Charged to costs and expenses |  | Charged to other accounts |  | Write-offs |  | Balance at end of year
|  |  |  | (In thousands) |  |
Allowance for doubtful accounts, year ended December 31: |  |  |  |  |  |  |  |  |  |
2015 |  | $ | — |  |  | $ | 14 |  |  | $ | — |  |  | $ | 14 |  |  | $ | — |
2016 |  | $ | — |  |  | $ | 14 |  |  | $ | — |  |  | $ | 14 |  |  | $ | — |
2017 |  | $ | — |  |  | $ | 4 |  |  | $ | — |  |  | $ | 4 |  |  | $ | — |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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