XML 149 R118.htm IDEA: XBRL DOCUMENT v3.19.1
Subsequent Events (Details)
 12 Months Ended
Feb. 22, 2019
USD ($)
shares
$ / shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Disclosure of non-adjusting events after reporting period [line items]      
Transaction costs   $ 10,229,000 $ 0
Repayment of credit facility   $ 0 $ 36,200,000
Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Percentage of voting equity interests acquired 100.00%    
Cash Election, right to receive cash | $ / shares $ 3.40    
Share Election, right to receive portion of Pan American shares per Tahoe share 0.2403    
Maximum cash consideration $ 275,000,000    
Maximum number of Pan American shares to be issued | shares 56,000,000.0    
Amount of shares for which holders made the Cash Election | shares 23,661,084    
Amount of shares for which holders made or were deemed to have made the Share Election | shares 290,226,406    
Share Election, cash transferred per acquired share | $ / shares $ 0.67    
Share Election, portion of Pan American shares per Tahoe share received as consideration 0.1929    
Contingent consideration, ratio of contingent value rights for each Tahoe share 1    
Contingent consideration, portion of Pan American shares exchanged for each CVR 0.0497    
Contingent consideration, term of CVRs 10 years    
Cash transferred $ 275,000,000    
Number of shares issued (shares) | shares 55,990,512    
Other tangible or intangible assets transferred $ 313,887,490    
Consideration transferred $ 1,100,000,000    
Pan American shareholders [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Percent owned after share issuance 73.00%    
Former Tahoe shareholders [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Percent owned after share issuance 27.00%    
Credit Facility [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Credit facility term   4 years  
Line of credit, maximum borrowing capacity   $ 300,000,000.0  
Credit Facility [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Line of credit, maximum borrowing capacity $ 500,000,000.0    
Amount by which facility has been increased 200,000,000.0    
Long-term debt 301,000,000    
Repayment of credit facility $ 125,000,000    
Bottom of range [member] | Credit Facility [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Line of credit facility, unused capacity, commitment fee (percent) 0.4219%    
Top of range [member] | Credit Facility [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Line of credit facility, unused capacity, commitment fee (percent) 0.6188%    
LIBOR [member] | Bottom of range [member] | Credit Facility [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Borrowings, adjustment to interest rate basis 1.875%    
LIBOR [member] | Top of range [member] | Credit Facility [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Borrowings, adjustment to interest rate basis 2.75%    
Bank of Nova Scotia's Base Rate [member] | Bottom of range [member] | Credit Facility [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Borrowings, adjustment to interest rate basis 0.875%    
Bank of Nova Scotia's Base Rate [member] | Top of range [member] | Credit Facility [member] | Major business combination [member] | Tahoe Resources, Inc [member]      
Disclosure of non-adjusting events after reporting period [line items]      
Borrowings, adjustment to interest rate basis 1.75%