XML 39 R29.htm IDEA: XBRL DOCUMENT
v3.20.2

PENSION AND POSTRETIREMENT PLANS (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
PENSION AND OTHER POSTRETIREMENT PLANS. |
Schedule of components of net periodic benefit cost (credit) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ | ​ | Pension Benefits | ​ | SERP Benefits | ​ | Pension Benefits | ​ | SERP Benefits
(In thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Components of net periodic benefit (credit) cost and other amounts recognized in other comprehensive income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | $ | 265 | ​ | $ | 273 |  | $ | 92 |  | $ | 65 | ​ | $ | 795 | ​ | $ | 818 |  | $ | 278 |  | $ | 196
Interest cost | ​ |  | 193 |  |  | 225 | ​ |  | 38 |  |  | 37 | ​ |  | 578 |  |  | 675 | ​ |  | 112 |  |  | 110
Expected return on plan assets | ​ |  | (713) |  |  | (608) | ​ |  | — |  |  | — | ​ |  | (2,138) |  |  | (1,823) | ​ |  | — |  |  | —
Amortization of net loss | ​ |  | 100 |  |  | 130 | ​ |  | 56 |  |  | 18 | ​ |  | 300 |  |  | 390 | ​ |  | 170 |  |  | 53
Amortization of prior service credit | ​ |  | (20) |  |  | (20) | ​ |  | — |  |  | — | ​ |  | (58) |  |  | (58) | ​ |  | — |  |  | —
Net periodic benefit (credit) cost | ​ | $ | (175) | ​ | $ | — |  | $ | 186 |  | $ | 120 | ​ | $ | (523) | ​ | $ | 2 |  | $ | 560 |  | $ | 359

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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration