XML 31 R18.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee Benefit Plans | 3 Months Ended
--- | ---
Mar. 31, 2018
Retirement Benefits [Abstract] |
Employee Benefit Plans | Employee Benefit Plans The components of net periodic benefit cost, included in other operating expenses on the condensed consolidated statements of income, for the three months ended March 31, 2018 and 2017 were as follows (dollars in thousands):
|  | Pension Benefits |  | Other Benefits
|  | Three months ended March 31, |  | Three months ended March 31,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Service cost |  | $ | 2,654 |  |  | $ | 2,580 |  |  | $ | 636 |  |  | $ | 721 |
Interest cost |  | 1,330 |  |  | 1,198 |  |  | 530 |  |  | 565 |
Expected return on plan assets |  | (1,554 | ) |  | (1,285 | ) |  | — |  |  | — |
Amortization of prior service cost (credit) |  | 83 |  |  | 74 |  |  | (329 | ) |  | (156 | )
Amortization of prior actuarial losses |  | 1,094 |  |  | 1,081 |  |  | 498 |  |  | 457 |
Settlements |  | — |  |  | 257 |  |  | — |  |  | — |
Net periodic benefit cost |  | $ | 3,607 |  |  | $ | 3,905 |  |  | $ | 1,335 |  |  | $ | 1,587 |
The Company made no pension contributions during the first three months of 2018 and expects to make pension contributions between $8.0 million and $10.0 million in 2018.

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