XML 59 R32.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Pension and Other Postretirement Benefit Plans (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2017
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | The following tables present the components of the PNM Plans’ net periodic benefit cost:
| Three Months Ended September 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
| (In thousands)
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 24 |  |  | $ | 35 |  |  | $ | — |  |  | $ | — |
Interest cost | 6,727 |  |  | 7,577 |  |  | 1,006 |  |  | 1,087 |  |  | 174 |  |  | 203 |
Expected return on plan assets | (8,451 | ) |  | (8,854 | ) |  | (1,308 | ) |  | (1,371 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 4,001 |  |  | 3,455 |  |  | 921 |  |  | 286 |  |  | 78 |  |  | 64 |
Amortization of prior service cost | (241 | ) |  | (241 | ) |  | (416 | ) |  | (7 | ) |  | — |  |  | — |
Net periodic benefit cost | $ | 2,036 |  |  | $ | 1,937 |  |  | $ | 227 |  |  | $ | 30 |  |  | $ | 252 |  |  | $ | 267 |
| Nine Months Ended September 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
| (In thousands)
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 72 |  |  | $ | 105 |  |  | $ | — |  |  | $ | — |
Interest cost | 20,181 |  |  | 22,731 |  |  | 3,019 |  |  | 3,260 |  |  | 523 |  |  | 609 |
Expected return on plan assets | (25,352 | ) |  | (26,562 | ) |  | (3,923 | ) |  | (4,113 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 12,004 |  |  | 10,365 |  |  | 2,762 |  |  | 858 |  |  | 235 |  |  | 192 |
Amortization of prior service cost | (724 | ) |  | (724 | ) |  | (1,248 | ) |  | (22 | ) |  | — |  |  | — |
Net periodic benefit cost | $ | 6,109 |  |  | $ | 5,810 |  |  | $ | 682 |  |  | $ | 88 |  |  | $ | 758 |  |  | $ | 801 |
The following tables present the components of the TNMP Plans’ net periodic benefit cost:
| Three Months Ended September 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
| (In thousands)
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 36 |  |  | $ | 46 |  |  | $ | — |  |  | $ | — |
Interest cost | 722 |  |  | 826 |  |  | 139 |  |  | 169 |  |  | 8 |  |  | 10 |
Expected return on plan assets | (945 | ) |  | (986 | ) |  | (114 | ) |  | (122 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 231 |  |  | 175 |  |  | (20 | ) |  | (10 | ) |  | 2 |  |  | 1 |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net Periodic Benefit Cost | $ | 8 |  |  | $ | 15 |  |  | $ | 41 |  |  | $ | 83 |  |  | $ | 10 |  |  | $ | 11 |
| Nine Months Ended September 30,
| Pension Plan |  | OPEB Plan |  | Executive Retirement Program
| 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
| (In thousands)
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | — |  |  | $ | — |  |  | $ | 107 |  |  | $ | 139 |  |  | $ | — |  |  | $ | — |
Interest cost | 2,165 |  |  | 2,478 |  |  | 417 |  |  | 508 |  |  | 25 |  |  | 30 |
Expected return on plan assets | (2,834 | ) |  | (2,957 | ) |  | (342 | ) |  | (367 | ) |  | — |  |  | — |
Amortization of net (gain) loss | 692 |  |  | 525 |  |  | (60 | ) |  | (30 | ) |  | 7 |  |  | 1 |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net Periodic Benefit Cost | $ | 23 |  |  | $ | 46 |  |  | $ | 122 |  |  | $ | 250 |  |  | $ | 32 |  |  | $ | 31 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
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=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration