Segmented Information - Revenue by Product (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Disclosure of products and services [line items]
Revenue	$ 1,350,759	$ 784,495
Refined silver and gold [member]
Disclosure of products and services [line items]
Revenue	894,202	348,717
Zinc concentrate [member]
Disclosure of products and services [line items]
Revenue	134,992	155,412
Lead concentrate [member]
Disclosure of products and services [line items]
Revenue	183,343	150,832
Copper concentrate [member]
Disclosure of products and services [line items]
Revenue	78,865	86,599
Silver Concentrate [member]
Disclosure of products and services [line items]
Revenue	$ 59,357	$ 42,935

Expiry date 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. Effective 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details