| Year ended December 31, | ||||||||
| 2017 | 2016 | |||||||
| At the beginning of the year | (132,913 | ) | (128,321 | ) | ||||
| Translation differences | (6,802 | ) | 365 | |||||
| Return on plan assets | (5,849 | ) | (7,022 | ) | ||||
| Remeasurements | (5,874 | ) | (3,022 | ) | ||||
| Contributions paid to the plan | (6,230 | ) | (4,374 | ) | ||||
| Benefits paid from the plan | 11,654 | 9,064 | ||||||
| Other | 323 | 397 | ||||||
| At the end of the year | (145,692 | ) | (132,913 | ) | ||||
| Year ended December 31, | ||||||||
| 2017 | 2016 | |||||||
| Equity instruments | 53.4 | % | 52.4 | % | ||||
| Debt instruments | 42.9 | % | 43.9 | % | ||||
| Others | 3.7 | % | 3.7 | % | ||||