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Other income (expense) (Tables)
12 Months Ended
Dec. 31, 2018
Other Income Expense [Abstract]  
Other income (expense) table
20182017
Foreign exchange gains (losses)$26,205$(23,168)
Gain on restructuring of JV Inkai(a)48,570-
Sale of exploration interests(b)25,027-
Contract restructuring6,201-
Write-off of long-term receivables-(5,926)
Other2,157(1,316)
Total$108,160$(30,410)