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Production costs by nature
 12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Production costs by nature
Production costs by nature

 
 
2018

 
2017

 
 
$

 
$

 
 
 
 
 
Raw materials and consumables
 
310,534

 
184,746

Contractors
 
80,884

 
63,328

Salaries and employee benefits
 
122,782

 
74,010

Electricity
 
19,476

 
18,652

Equipment rental
 
4,733

 
6,987

Other
 
30,347

 
21,767

Silver credits
 
(5,092
)
 
(7,850
)
Change in inventories
 
(13,001
)
 
(26,140
)
Capitalized to mining interests
 
(74,961
)
 
(33,106
)
 
 
475,702

 
302,394



Salaries and employee benefits expense included in general and administrative costs were $30 million for the year ended December 31, 2018 (2017 - $22 million).