XML 197 R183.htm IDEA: XBRL DOCUMENT v3.8.0.1

Mining royalties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Mining Royalties [Line Items]
Royalty Expense	$ (31,217)	$ (27,611)	$ 27,188

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- References

No definition available.

+ Details

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- Definition

The amount of expense arising from royalties.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2017-01-01
-Paragraph 85
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-URIDate 2017-03-09

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