XML 60 R28.htm IDEA: XBRL DOCUMENT v3.8.0.1
Production Costs
 12 Months Ended
Dec. 31, 2017
Analysis of income and expense [abstract]  
Production Costs
21. PRODUCTION COSTS
 
 
Production costs are comprised of the following: 
 
 
2017

 
2016

Consumption of raw materials and consumables
 
$
160,224

 
$
163,675

Employee compensation and benefits expense (Note 22)
 
169,109

 
148,256

Contractors and outside services
 
83,012

 
81,241

Utilities
 
24,764

 
20,335

Severance costs related to mine operations
 
3,509

 
—

Other expenses (1)
 
34,339

 
43,400

Changes in inventories (2)
 
25,713

 
(28,574
)
 
 
$
500,670


$
428,333

(1)
Includes closure and decommissioning liability adjustments to reduce production costs by $1.2 million (2016 - reduce by $1.7 million).
(2)
Includes NRV adjustments to inventory to increase production costs by $12.3 million for the year ended December 31, 2017 (2016 - reduce by $42.8 million).