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Supplementary Cash-Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Supplementary Cash-Flow Information
Unrealized (gain) loss on gold and silver rounds/bullion			$ 141	$ (156)
Unrealized foreign currency exchange loss (gain)Unrealized foreign currency exchange loss (gain)	$ 1,100	$ (625)	74	(27)
Loss on disposition of fixed assets			5	301
Other			144	30
Total other operating adjustments			$ 364	$ 148

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Other Adjustments

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Unrealized (gain) loss on gold and silver rounds/bullion

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Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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