XML 126 R99.htm IDEA: XBRL DOCUMENT v3.21.1
Closure and Reclamation Provisions (Schedule of Estimates Used in Closure and Rehabilitation Provisions) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
Provision for decommissioning, restoration and rehabilitation costs [member]  
Disclosure of other provisions [line items]  
Undiscounted estimated cash flow $ 39,709
Caylloma M&I Property [member] | Bottom of range [member]  
Disclosure of other provisions [line items]  
Anticipated settlement date 2021
Caylloma M&I Property [member] | Top of range [member]  
Disclosure of other provisions [line items]  
Anticipated settlement date 2032
Caylloma M&I Property [member] | Provision for decommissioning, restoration and rehabilitation costs [member]  
Disclosure of other provisions [line items]  
Undiscounted estimated cash flow $ 14,899
Estimated life of mine (years) 7 years
Discount rate 2.25%
Inflation rate 2.00%
San Jose M&I Property [member] | Bottom of range [member]  
Disclosure of other provisions [line items]  
Anticipated settlement date 2025
San Jose M&I Property [member] | Top of range [member]  
Disclosure of other provisions [line items]  
Anticipated settlement date 2037
San Jose M&I Property [member] | Provision for decommissioning, restoration and rehabilitation costs [member]  
Disclosure of other provisions [line items]  
Undiscounted estimated cash flow $ 6,864
Estimated life of mine (years) 5 years
Discount rate 5.25%
Inflation rate 3.52%
Lindero Project [member] | Bottom of range [member]  
Disclosure of other provisions [line items]  
Anticipated settlement date 2029
Lindero Project [member] | Top of range [member]  
Disclosure of other provisions [line items]  
Anticipated settlement date 2042
Lindero Project [member] | Provision for decommissioning, restoration and rehabilitation costs [member]  
Disclosure of other provisions [line items]  
Undiscounted estimated cash flow $ 17,946
Estimated life of mine (years) 13 years
Discount rate 1.45%
Inflation rate 2.06%