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Employee benefits (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of detailed information about provision for employee benefits [Abstract] |
Disclosure of detailed information about provision for employee benefits [Text Block] |
Classes of benefits and expenses by employee |  |  | 12/31/2017 |  |  | 12/31/2016 |
|  |  | ThUS$ |  |  | ThUS$ |
Current |  |  |  |  |  |  |
Profit sharing and bonuses |  |  | 22,421 |  |  | 20,998 |
Total |  |  | 22,421 |  |  | 20,998 |
Non-current |  |  |  |  |  |  |
Profit sharing and bonuses |  |  | 6,487 |  |  | - |
Severance indemnity payments |  |  | 27,445 |  |  | 22,532 |
Total |  |  | 33,932 |  |  | 22,532 |
The other long-term benefits relate to staff severance indemnities and are recorded at their actuarial value, and an executive compensation plan (see Note 16).
Staff severance indemnities at actuarial value |  |  | 12/31/2017 |  |  | 12/31/2016 |
|  |  | ThUS$ |  |  | ThUS$ |
Staff severance indemnities, Chile |  |  | 25,893 |  |  | 21,384 |
Plan compensación ejecutivos |  |  | 6,487 |  |  | - |
Other obligations in companies elsewhere |  |  | 1,552 |  |  | 1,148 |
Total other non-current liabilities |  |  | 33,932 |  |  | 22,532 |
Disclosure of detailed information about post employment benefit obligations [Text Block] |
Reconciliation |  |  | 12/31/2017 |  |  | 12/31/2016 |  |  | 12/31/2015 |
Changes in the benefit obligation |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Benefit obligation at the beginning of the year |  |  | 8,185 |  |  | 7,949 |  |  | 7,324 |
Service cost |  |  | 2 |  |  | 2 |  |  | 3 |
Interest cost |  |  | 359 |  |  | 387 |  |  | 380 |
Actuarial loss |  |  | 556 |  |  | 200 |  |  | 600 |
Benefits paid |  |  | (347) |  |  | (353) |  |  | (358) |
Benefit obligation at the end of the year |  |  | 8,755 |  |  | 8,185 |  |  | 7,949 |
|  |  | 12/31/2017 |  |  | 12/31/2016 |  |  | 12/31/2015 |
Changes in the plan assets: |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Fair value of plan assets at the beginning of the year |  |  | 7,404 |  |  | 7,464 |  |  | 7,967 |
Actual return (loss) in plan assets |  |  | 1,694 |  |  | 293 |  |  | (145) |
Benefits paid |  |  | (347) |  |  | (353) |  |  | (358) |
Fair value of plan assets at the end of the year |  |  | 8,751 |  |  | 7,404 |  |  | 7,464 |
Financing status |  |  | (4) |  |  | (781) |  |  | (485) |
Items not yet recognized as net periodic pension cost components: |  |  |  |  |  |  |  |  |  |
Net actuarial loss at the beginning of the year |  |  | (3,432) |  |  | (3,165) |  |  | (1,903) |
Amortization during the year |  |  | 219 |  |  | 184 |  |  | 68 |
Net estimated gain or loss occurred during the year |  |  | 599 |  |  | (451) |  |  | (1,330) |
Adjustment to recognize the minimum pension obligation |  |  | (2,614) |  |  | (3,432) |  |  | (3,165) |
The net periodic pension expense was composed of the following components for the years ended December 31, 2017, 2016 and 2015:
Reconciliation |  |  | 12/31/2017 |  |  | 12/31/2016 |  |  | 12/31/2015 |
|  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Service cost or benefits received during the year |  |  | 2 |  |  | 2 |  |  | 3 |
Interest cost in benefit obligation |  |  | 359 |  |  | 387 |  |  | 380 |
Actual return in plan assets |  |  | 1,694 |  |  | 293 |  |  | (145) |
Amortization of prior year losses |  |  | 219 |  |  | 184 |  |  | 68 |
Net gain during the year |  |  | 599 |  |  | 610 |  |  | 728 |
Net periodic pension expense |  |  | 41 |  |  | 29 |  |  | (133) |
Disclosure of net defined benefit liability (asset) [text block] | As of December 31, 2017 , 2016 and 2015, severance indemnities calculated at the actuarial value are as follows:
|  |  | 12/31/2017 ThUS$ |  |  | 12/31/2016 ThUS$ |  | 12/31/2015 ThUS |
Opening balance |  |  | (22,532) |  |  | (21,995) |  | (30,952) |
Current cost of service |  |  | (934) |  |  | (1,333) |  | (898) |
Interest cost |  |  | (1,488) |  |  | (1,407) |  | (1,588) |
Actuarial gain/loss |  |  | (1,144) |  |  | (2,253) |  | 1,242 |
Exchange rate difference |  |  | (2,284) |  |  | (1,215) |  | 3,582 |
Benefits paid during the year |  |  | 937 |  |  | 5,671 |  | 6,619 |
Balance |  |  | (27,445) |  |  | (22,532) |  | (21,995) |
Disclosure of detailed information about employee Actuarial assumption rate [Text Block] | The liability recorded for staff severance indemnity is valued at the actuarial value method, using the following actuarial assumptions:
|  | 12/31/2017 |  | 12/31/2016 |  | 12/31/2015 |  |  |
Mortality rate |  | RV - 2014 |  | RV - 2009 |  | RV - 2009 |  |  |
Actual annual interest rate |  | 5.114 | % | 4.522 | % | 4.89 | % |  |
Voluntary retirement rate: |  |  |  |  |  |  |  |  |
Men |  | 6.49 | % | 7.16 | % | 7.16 | % | annual |
Women |  | 6.49 | % | 7.16 | % | 7.16 | % | annual |
Salary increase |  | 3.00 | % | 3.60 | % | 3.60 | % | annual |
Retirement age: |  |  |  |  |  |  |  |  |
Men |  | 65 |  | 65 |  | 65 |  | years |
Women |  | 60 |  | 60 |  | 60 |  | years |
Disclosure Of Sensitivity Analysis For Actuarial Assumptions Explanatory [Text Block] | As of December 31, 2017 and December 31, 2016, the Company has conducted a sensitivity analysis of the main assumptions of the actuarial calculation, determining the following:
Sensitivity analysis 12/31/2017 |  |  | Effect + 100 basis points ThUS$ |  |  | Effect - 100 basis points ThUS$ |
Discount rate |  |  | (1,991) |  |  | 2,436 |
Employee turnover rate |  |  | (252) |  |  | 281 |
Sensitivity analysis 12/31/2016 |  |  | Effect + 100 basis points ThUS$ |  |  | Effect - 100 basis points ThUS$ |
Discount rate |  |  | (1,576) |  |  | 1,773 |
Employee turnover rate |  |  | (207) |  |  | 231 |

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