Selling Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Selling Expenses [Line Items]
Sales and marketing expense	$ 27,522	$ 24,088	$ 21,733
Sociedad Minera Cerro Verde S.A.A. [Member]
Disclosure of Selling Expenses [Line Items]
concentrate freight	126,670	131,528	122,431
commissions	6,048	6,029	5,989
cathode freight	1,831	1,665	2,148
Other	2,459	2,447	823
Sales and marketing expense	$ 0	$ 141,669	$ 131,391

The amount of expense relating to the marketing and selling of goods or services.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard
-URIDate 2018-03-16

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration