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Pension, Savings, and Other Employee Benefits (Tables) | 9 Months Ended
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Sep. 30, 2018
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Benefit Cost | The amounts reclassified are presented in the table below.
| Three Months Ended September 30, 2017 |  | Nine Months Ended September 30, 2017 |  | Fiscal Years Ended December 31
(Dollars in thousands) |  |  | 2017 |  | 2016 |  | 2015
Net periodic benefit cost reclassified | $ | 415 |  |  | $ | 1,665 |  |  | $ | 1,946 |  |  | $ | (843 | ) |  | $ | (1,168 | )
The components of net periodic benefit cost for the three months ended September 30 are as follows:
|  | Pension Benefits |  | Other Benefits
(Dollars in thousands) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Components of net periodic benefit cost |  |  |  |  |  |  |  |
Service cost |  | $ | 11 |  |  | $ | 9 |  |  | $ | 33 |  |  | $ | 26 |
Interest cost |  | 6,935 |  |  | 7,276 |  |  | 328 |  |  | 328 |
Expected return on plan assets |  | (8,222 | ) |  | (9,230 | ) |  | (268 | ) |  | (236 | )
Amortization of unrecognized: |  |  |  |  |  |  |  |
Prior service cost/(credit) |  | — |  |  | 13 |  |  | — |  |  | 23 |
Actuarial (gain)/loss |  | 3,164 |  |  | 2,380 |  |  | (108 | ) |  | (140 | )
Net periodic benefit cost/(credit) |  | $ | 1,888 |  |  | $ | 448 |  |  | $ | (15 | ) |  | $ | 1 |
The components of net periodic benefit cost for the nine months ended September 30 are as follows:
|  | Pension Benefits |  | Other Benefits
(Dollars in thousands) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Components of net periodic benefit cost |  |  |  |  |  |  |  |
Service cost |  | $ | 31 |  |  | $ | 28 |  |  | $ | 100 |  |  | $ | 80 |
Interest cost |  | 20,908 |  |  | 22,035 |  |  | 982 |  |  | 979 |
Expected return on plan assets |  | (24,673 | ) |  | (27,011 | ) |  | (806 | ) |  | (710 | )
Amortization of unrecognized: |  |  |  |  |  |  |  |
Prior service cost/(credit) |  | — |  |  | 39 |  |  | — |  |  | 71 |
Actuarial (gain)/loss |  | 9,076 |  |  | 7,140 |  |  | (290 | ) |  | (425 | )
Net periodic benefit cost/(credit) |  | $ | 5,342 |  |  | $ | 2,231 |  |  | $ | (14 | ) |  | $ | (5 | )

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- 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=108410482&loc=d3e1928-114920 + Details
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