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Retirement Benefit Plans | 3 Months Ended
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Mar. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Retirement Benefit Plans |
12. | Retirement Benefit Plans
Our defined benefit pension plans and postretirement medical plan are described in Note 13 of our annual report on Form 10-K for the year ended December 31, 2017. We have contributed $114 and $269 during the first quarter of 2018 to our pension plans and postretirement medical plan, respectively. The components of the net periodic (benefit) cost for the three months ended March 31, 2018 and 2017 were as follows:
|  | Three Months Ended
|  | March 31
|  | Pension Benefits |  | Postretirement
|  | U.S. Plans |  | Non-U.S. Plans |  | Medical Benefits
|  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Service cost |  | $ | — |  |  | $ | — |  |  | $ | 37 |  |  | $ | 24 |  |  | $ | 14 |  |  | $ | 20 |
Interest cost |  | 11 |  |  | 390 |  |  | 71 |  |  | 90 |  |  | 75 |  |  | 91 |
Expected return on plan assets |  | — |  |  | (585 | ) |  | (109 | ) |  | (96 | ) |  | — |  |  | — |
Amortization of net actuarial loss |  | 13 |  |  | 10 |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost |  | — |  |  | — |  |  | 74 |  |  | 47 |  |  | — |  |  | — |
Foreign currency |  | — |  |  | — |  |  | (71 | ) |  | (5 | ) |  | — |  |  | — |
Net periodic cost (benefit) |  | 24 |  |  | (185 | ) |  | 2 |  |  | 60 |  |  | 89 |  |  | 111 |
Settlement charge |  | 50 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net benefit cost (credit) |  | $ | 74 |  |  | $ | (185 | ) |  | $ | 2 |  |  | $ | 60 |  |  | $ | 89 |  |  | $ | 111 |

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- 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
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