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Other assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Assets1 [Abstract]
Low-grade stockpile	$ 18,237	$ 11,727
Debt service reserve account (Note 10)	13,736	12,918
Loan receivable, including accrued interest	5,053	7,718
Reclamation deposits	2,485	2,353
Derivative instruments at fair value (Note 14)	0	2,768
Other	840	2,364
Other non-current assets	40,351	39,848
Current financial assets at fair value	$ 1,000	$ 6,000

X

- Definition

Miscellaneous Non-current Other Assets

+ References

No definition available.

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- Definition

Noncurrent Loan And Interest Receivable

+ References

No definition available.

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- Definition

Other Assets1 [Abstract]

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- Definition

Reclamation Deposits

+ References

No definition available.

+ Details

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X

- Definition

The amount of current financial assets measured at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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X

- Definition

The amount of non-current derivative financial assets. [Refer: Derivative financial assets]

+ References

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- Definition

A classification of non-current inventory representing the amount of ore stockpiles. [Refer: Inventories]

+ References

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- Definition

The amount of non-current restricted cash and cash equivalents. [Refer: Restricted cash and cash equivalents]

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- Definition

The amount of non-current assets that the entity does not separately disclose in the same statement or note. [Refer: Non-current assets]

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