XML 53 R32.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Pension and Other Postretirement Benefit Plans (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2015
Public Service Company of New Mexico [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Benefit Costs | The following tables present the components of the PNM Plans’ net periodic benefit cost:
| Three Months Ended June 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2015 |  | 2014
| (In thousands)
Components of Net Periodic |  |  |  |  |  |  |  |  |  |  |
Benefit Cost |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 51 |  |  | $ | 45 |  |  | $ | — |  |  | $ | — |
Interest cost | 7,064 |  |  | 7,541 |  |  | 1,023 |  |  | 1,159 |  |  | 190 |  |  | 205 |
Expected return on plan assets | (9,831 | ) |  | (9,511 | ) |  | (1,403 | ) |  | (1,410 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 3,705 |  |  | 3,255 |  |  | 491 |  |  | 556 |  |  | 81 |  |  | 52 |
Amortization of prior service cost | (241 | ) |  | (241 | ) |  | (160 | ) |  | (336 | ) |  | — |  |  | — |
Net periodic benefit cost | $ | 697 |  |  | $ | 1,044 |  |  | $ | 2 |  |  | $ | 14 |  |  | $ | 271 |  |  | $ | 257 |
| Six Months Ended June 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2015 |  | 2014
| (In thousands)
Components of Net Periodic |  |  |  |  |  |  |  |  |  |  |
Benefit Cost |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 102 |  |  | $ | 91 |  |  | $ | — |  |  | $ | — |
Interest cost | 14,127 |  |  | 15,082 |  |  | 2,045 |  |  | 2,315 |  |  | 380 |  |  | 411 |
Expected return on plan assets | (19,662 | ) |  | (19,022 | ) |  | (2,805 | ) |  | (2,819 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 7,410 |  |  | 6,510 |  |  | 983 |  |  | 1,113 |  |  | 162 |  |  | 105 |
Amortization of prior service cost | (483 | ) |  | (483 | ) |  | (321 | ) |  | (672 | ) |  | — |  |  | — |
Net periodic benefit cost | $ | 1,392 |  |  | $ | 2,087 |  |  | $ | 4 |  |  | $ | 28 |  |  | $ | 542 |  |  | $ | 516 |
Texas-New Mexico Power Company [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Benefit Costs | The following tables present the components of the TNMP Plans’ net periodic benefit cost (income):
| Three Months Ended June 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2015 |  | 2014
| (In thousands)
Components of Net Periodic |  |  |  |  |  |  |  |  |  |  |
Benefit Cost (Income) |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 62 |  |  | $ | 59 |  |  | $ | — |  |  | $ | — |
Interest cost | 761 |  |  | 798 |  |  | 152 |  |  | 155 |  |  | 9 |  |  | 10 |
Expected return on plan assets | (1,105 | ) |  | (1,132 | ) |  | (130 | ) |  | (133 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 195 |  |  | 166 |  |  | — |  |  | (31 | ) |  | 1 |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | 8 |  |  | — |  |  | — |
Net Periodic Benefit Cost (Income) | $ | (149 | ) |  | $ | (168 | ) |  | $ | 84 |  |  | $ | 58 |  |  | $ | 10 |  |  | $ | 10 |
| Six Months Ended June 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2015 |  | 2014
| (In thousands)
Components of Net Periodic |  |  |  |  |  |  |  |  |  |  |
Benefit Cost (Income) |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 124 |  |  | $ | 119 |  |  | $ | — |  |  | $ | — |
Interest cost | 1,521 |  |  | 1,597 |  |  | 304 |  |  | 309 |  |  | 18 |  |  | 20 |
Expected return on plan assets | (2,210 | ) |  | (2,263 | ) |  | (260 | ) |  | (267 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 391 |  |  | 333 |  |  | — |  |  | (61 | ) |  | 2 |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | 16 |  |  | — |  |  | — |
Net Periodic Benefit Cost (Income) | $ | (298 | ) |  | $ | (333 | ) |  | $ | 168 |  |  | $ | 116 |  |  | $ | 20 |  |  | $ | 20 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=pnm_PublicServiceCompanyOfNewMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=pnm_TexasNewMexicoPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |