Employee benefits (Tables)

12 Months Ended

Dec. 31, 2020

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	As of December 31, 2020		As of December 31, 2019
	ThUS$		ThUS$
Current
Profit sharing and bonuses		7,770		-
Performance bonds and operational targets		1,326		16,387
Total		9,096		16,387
Non-current
Profit sharing and bonuses		-		8,026
Severance indemnity payments		32,199		27,814
Total		32,199		35,840

Disclosure of detailed information about post employment benefit obligations [Text Block]

Reconciliation	As of December 31, 2020			As of December 31, 2019			As of December 31, 2018
Changes in the benefit obligation	ThUS$			ThUS$			ThUS$
Benefit obligation at the beginning of the year		9,586			8,657			8,755
Service cost		-			-			-
Interest cost		280			336			319
Actuarial loss		506			984			63
Benefits paid		(508	)		(391	)		(480	)
Total		9,864			9,586			8,657

Reconciliation	As of December 31, 2020			As of December 31, 2019			As of December 31, 2018
Changes in the plan assets	ThUS$			ThUS$			ThUS$
Fair value of plan assets at the beginning of the year		8,754			8,404			8,751
Actual return (loss) in plan assets		4,642			741			133
Benefits paid		(508	)		(391	)		(480	)
Fair value of plan assets at the end of the year		12,888			8,754			8,404
Financing status		3,025			(832	)		(253	)
Items not yet recognized as net periodic pension cost components:
Net actuarial loss at the beginning of the year		(3,634	)		(3,022	)		(2,614	)
Amortization during the year		326			242			160
Net estimated gain or loss occurred during the year		3,500			(854	)		(568	)
Adjustment to recognize the minimum pension obligation		192			(3,634	)		(3,022	)

Service cost or benefits received during the year	As of December 31, 2020			As of December 31, 2019			As of December 31, 2018
	ThUS$			ThUS$			ThUS$
Service cost or benefits received during the year		-			-			-
Interest cost in benefit obligation		280			336			319
Actual return in plan assets		4,642			741			133
Amortization of prior year losses		326			242			160
Net gain during the year		3,500			(854	)		(568	)
Net periodic pension expense		(31	)		(33	)		(159	)

Disclosure of net defined benefit liability (asset) [text block]

As of December 31, 2020, and 2019, severance indemnities calculated at the actuarial value are as follows:

Staff severance indemnities	As of December 31, 2020			As of December 31, 2019			As of December 31, 2018
	ThUS$			ThUS$			ThUS$
Opening balance		(27,814	)		(28,233	)		(27,445	)
Current cost of Service		(3,804	)		(2,880	)		(1,529	)
Interest cost		(1,486	)		(1,661	)		(1,658	)
Actuarial gain/loss		(2,826	)		(2,514	)		(1,617	)
Exchange rate difference		(1,513	)		2,475			2,710
Benefits paid during the year		5,244			4,999			1,306
Total		(32,199	)		(27,814	)		(28,233	)

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:

Actuarial assumptions	As of December 31, 2020			As of December 31, 2019			As of December 31, 2018			Annual/Years
Mortality rate		RV - 2014			RV - 2014			RV - 2014
Actual annual interest rate		3.65	%		3.68	%		4.64	%
Voluntary retirement rate:
Men		6.49	%		6.49	%		6.49	%		Annual
Women		6.49	%		6.49	%		6.49	%		Annual
Salary increase		3.00	%		3.00	%		3.00	%		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, 2020, and 2019, the Company has conducted a sensitivity analysis of the main assumptions of the actuarial calculation, determining the following:

Sensitivity analysis as of December 31, 2020	Effect + 100 basis points			Effect - 100 basis points
	ThUS$			ThUS$
Discount rate		(1,985	)		2,234
Employee turnover rate		(261	)		291

Sensitivity analysis as of December 31, 2019	Effect + 100 basis points			Effect - 100 basis points
	ThUS$			ThUS$
Discount rate		(1,796	)		2,021
Employee turnover rate		(236	)		263