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OTHER LIABILITIES - Funded Status of Defined Benefit Obligations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Details of defined benefit liability    
Balance at the beginning of year $ 9,675  
Balance at end of year $ 21,786 $ 9,675
Minimum number of years of service for retirement program 10 years  
Minimum age limit to eligible for retirement program (in years) 55 years  
Plan assets    
Details of defined benefit liability    
Balance at the beginning of year $ (2,192) (2,011)
Agnico Eagle's contributions 303 327
Benefit payments (90) (88)
Administrative expenses (106) (119)
Interest on assets 87 86
Net return on assets excluding interest (87) (86)
Effect of exchange rate changes 158 61
Balance at end of year (2,457) (2,192)
Present value of defined benefit obligation    
Details of defined benefit liability    
Balance at the beginning of year 11,867 10,641
Current service cost 493 326
Past service cost 8,754  
Benefit payments 90 88
Interest cost 544 456
Actuarial losses arising from changes in economic assumptions 1,035 400
Actuarial losses (gains) arising from experience 421 (185)
Effect of exchange rate changes (1,219) (317)
Balance at end of year $ 24,243 $ 11,867
Executives Plan    
Details of defined benefit liability    
Estimated average remaining duration of defined benefit plan 1 year