XML 21 R9.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Benefit Plans | 9 Months Ended
--- | ---
Sep. 30, 2017
Retirement Benefits [Abstract] |
Benefit Plans | Benefit Plans The components of our consolidated net pension costs are set forth in the following table:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2016 |  | 2017 |  | 2016 |  | 2017
| (Dollars in thousands)
Service cost | $ | 506 |  |  | $ | 496 |  |  | $ | 1,517 |  |  | $ | 1,487 |
Interest cost | 1,498 |  |  | 1,385 |  |  | 4,494 |  |  | 4,154 |
Expected return on plan assets | (1,307 | ) |  | (1,389 | ) |  | (3,922 | ) |  | (4,166 | )
Net cost | $ | 697 |  |  | $ | 492 |  |  | $ | 2,089 |  |  | $ | 1,475 |
The components of our consolidated net postretirement costs are set forth in the following table:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2016 |  | 2017 |  | 2016 |  | 2017
| (Dollars in thousands)
Service cost | $ | 1 |  |  | $ | 1 |  |  | $ | 3 |  |  | $ | 1 |
Interest cost | 272 |  |  | 241 |  |  | 815 |  |  | 724 |
Net cost | $ | 273 |  |  | $ | 242 |  |  | $ | 818 |  |  | $ | 725 |

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 The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
Name: | us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration