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Retirement Benefit Plans | 9 Months Ended
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Sep. 30, 2017
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, 2016. We have contributed $145 and $198 during the third quarter of 2017 and $410 and $493 during the first nine months of 2017 to our pension plans and postretirement medical plan, respectively. The components of the net periodic (benefit) cost for the three and nine months ended September 30, 2017 and 2016 were as follows:
|  | Three Months Ended
|  | September 30
|  | Pension Benefits |  | Postretirement
|  | U.S. Plans |  | Non-U.S. Plans |  | Medical Benefits
|  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
Service cost |  | $ | — |  |  | $ | 88 |  |  | $ | 124 |  |  | $ | 32 |  |  | $ | 6 |  |  | $ | 25 |
Interest cost |  | 373 |  |  | 414 |  |  | 96 |  |  | 96 |  |  | 91 |  |  | 99 |
Expected return on plan assets |  | (581 | ) |  | (599 | ) |  | (101 | ) |  | (89 | ) |  | — |  |  | — |
Amortization of net actuarial loss |  | 12 |  |  | 13 |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost |  | — |  |  | 10 |  |  | 50 |  |  | 29 |  |  | — |  |  | — |
Foreign currency |  | — |  |  | — |  |  | 135 |  |  | (57 | ) |  | — |  |  | — |
Net periodic (benefit) cost |  | $ | (196 | ) |  | $ | (74 | ) |  | $ | 304 |  |  | $ | 11 |  |  | $ | 97 |  |  | $ | 124 |
|  | Nine Months Ended
|  | September 30
|  | Pension Benefits |  | Postretirement
|  | U.S. Plans |  | Non-U.S. Plans |  | Medical Benefits
|  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
Service cost |  | $ | — |  |  | $ | 265 |  |  | $ | 172 |  |  | $ | 104 |  |  | $ | 46 |  |  | $ | 73 |
Interest cost |  | 1,153 |  |  | 1,244 |  |  | 315 |  |  | 304 |  |  | 272 |  |  | 298 |
Expected return on plan assets |  | (1,752 | ) |  | (1,799 | ) |  | (298 | ) |  | (283 | ) |  | — |  |  | — |
Amortization of net actuarial loss |  | 33 |  |  | 30 |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost |  | — |  |  | 31 |  |  | 146 |  |  | 93 |  |  | — |  |  | — |
Settlement charge |  | 205 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Foreign currency |  | — |  |  | — |  |  | 364 |  |  | (33 | ) |  | — |  |  | — |
Net periodic (benefit) cost |  | $ | (361 | ) |  | $ | (229 | ) |  | $ | 699 |  |  | $ | 185 |  |  | $ | 318 |  |  | $ | 371 |

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