The amount of future capital expenditures that the entity is committed to make.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2018-01-01
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

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The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2019-01-01
-Name IAS
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-IssueDate 2018-01-01
-Paragraph 35
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-URIDate 2018-03-16

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The estimated quantity of diesel escaped containment affecting the surrounding soil and a nearby stream.

+ References

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- Definition

Represents the number of lawsuits.

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- Definition

The amount of penalty for regulatory non-compliance at the facility.

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- Definition

Represents volume of contaminated water.

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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands, gal in Millions	May 19, 2017 USD ($) l	Aug. 05, 2015 gal	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 02, 2016 lawsuit
Commitments and contingencies
Future capital expenditures			$ 101,900	$ 192,700
Volume of contaminated water \| gal		3
Compania Minera Maricunga \| Legal Proceedings Contingent Liability
Commitments and contingencies
Number of lawsuits \| lawsuit					2
Volume of diesel escaped containment \| l	15,000
Penalty for regulatory non-compliance	$ 35
2019
Commitments and contingencies
Future minimum lease payments			11,400
2020
Commitments and contingencies
Future minimum lease payments			9,100
2021
Commitments and contingencies
Future minimum lease payments			8,500
2022
Commitments and contingencies
Future minimum lease payments			5,000
2023
Commitments and contingencies
Future minimum lease payments			5,000
2024 and thereafter
Commitments and contingencies
Future minimum lease payments			$ 31,300