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Debt (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 22, 2019
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2020
Jul. 31, 2020
Mar. 31, 2020
Feb. 01, 2019
Mar. 31, 2017
Disclosure of detailed information about borrowings [line items]                  
Amount drawn down     $ 80,000,000 $ 335,000,000          
Repayment of credit facility     355,000,000 185,000,000          
Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Total long-term debt     $ 0 $ 275,000,000          
Credit facility term       4 years          
Line of credit, maximum borrowing capacity       $ 300,000,000.0          
Debt covenant, tangible net worth requirement                 $ 1,036,400,000
Debt covenant, tangible net worth, net income added (percent)   50.00%              
Debt covenant, tangible net worth requirement, percent             70.00%    
Debt covenant, leverage ratio     3.5            
Debt covenant, interest coverage ratio     3.0            
Repayment of credit facility     $ 60,000,000            
Standby charges on undrawn amounts     2,200,000 900,000          
Interest expense on borrowings     5,000,000.0 $ 11,600,000          
Loans [Member]                  
Disclosure of detailed information about borrowings [line items]                  
Total long-term debt     $ 0.0            
Amount borrowed         $ 2,800,000 $ 2,800,000      
Weighted average [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate on borrowings (percent)     2.60% 4.30%          
Weighted average [member] | Loans [Member]                  
Disclosure of detailed information about borrowings [line items]                  
Interest rate on borrowings (percent)     1.30%            
Tahoe Resources, Inc [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Line of credit, maximum borrowing capacity $ 500,000,000.0             $ 400,000,000.0  
Additional upfront costs $ 2,000,000.0                
Repayment of credit facility     $ 125,000,000            
Tahoe Resources, Inc [member] | Bottom of range [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Line of credit facility, unused capacity, commitment fee (percent)     0.4219%            
Tahoe Resources, Inc [member] | Top of range [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Line of credit facility, unused capacity, commitment fee (percent)     0.6188%            
Tahoe Resources, Inc [member] | LIBOR [member] | Bottom of range [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings, adjustment to interest rate basis     1.875%            
Tahoe Resources, Inc [member] | LIBOR [member] | Top of range [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings, adjustment to interest rate basis     2.75%            
Tahoe Resources, Inc [member] | Bank of Nova Scotia's Base Rate [member] | Bottom of range [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings, adjustment to interest rate basis     0.875%            
Tahoe Resources, Inc [member] | Bank of Nova Scotia's Base Rate [member] | Top of range [member] | Credit Facility [member]                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings, adjustment to interest rate basis     1.75%