| | | 12-31-2017 | | 12-31-2016 | |
| | | ThU.S.$ | | ThU.S.$ | |
| Current | | 5,730 | | 5,244 | |
| Non-current | | 66,033 | | 60,084 | |
| Total | | 71,763 | | 65,328 | |
| | | 12-31-2017 | | 12-31-2016 | |
| Reconciliation of the present value of severance indemnities obligations | | ThU.S.$ | | ThU.S.$ | |
| Opening balance | | 65,328 | | 56,433 | |
| Current service cost | | 5,583 | | 5,334 | |
| Interest cost | | 3,208 | | 2,957 | |
| (Gains) losses from changes in actuarial assumptions | | (3,711) | | 2,083 | |
| Actuarial gains and losses arising from experience | | 1,212 | | 3,503 | |
| Benefits paid | | (5,654) | | (7,871) | |
| Increase (decrease) for foreign currency exchange rates changes | | 5,792 | | 2,889 | |
| Closing balance | | 71,763 | | 65,328 | |