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Provisions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of other provisions [line items]
Provisions, beginning	$ 69,493	$ 59,943
Revisions in estimates and obligations incurred	6,516	12,561
-new provisions	1,308	767
-change in estimate	(173)	(228)
-exchange gains on provisions	(253)	93
Charged in the year	(411)	(867)
Reclamation expenditures	(7,849)	(8,749)
Accretion expense (Note 23)	6,524	5,973
Provisions, ending	75,155	69,493
Contingent liability for decommissioning, restoration and rehabilitation costs [member]
Disclosure of other provisions [line items]
Provisions, beginning	65,396	55,611
Revisions in estimates and obligations incurred	6,516	12,561
-new provisions	0	0
-change in estimate	0	0
-exchange gains on provisions	0	0
Charged in the year	0	0
Reclamation expenditures	(7,849)	(8,749)
Accretion expense (Note 23)	6,524	5,973
Provisions, ending	70,587	65,396
Litigation [member]
Disclosure of other provisions [line items]
Provisions, beginning	4,097	4,332
Revisions in estimates and obligations incurred	0	0
-new provisions	1,308	767
-change in estimate	(173)	(228)
-exchange gains on provisions	(253)	93
Charged in the year	(411)	(867)
Reclamation expenditures	0	0
Accretion expense (Note 23)	0	0
Provisions, ending	$ 4,568	$ 4,097

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The increase in existing other provisions. [Refer: Other provisions]

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- Definition

The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions]

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The amount recognised for new other provisions. [Refer: Other provisions]

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The amount used (ie incurrent and charged against the provision) for other provisions. [Refer: Other provisions]

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The amount of liabilities of uncertain timing or the amount recognised when: (a) the entity has a present obligation (legal or constructive) as a result of a past event; (b) it is probable (ie more likely than not) that an outflow of resources embodying economic benefits will be required to settle the obligation; and (c) a reliable estimate can be made of the amount of the obligation.

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Increase (Decrease) in Reclamation Expenditures

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