XML 59 R28.htm IDEA: XBRL DOCUMENT v3.19.1
Production Costs
 12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Production Costs
21. PRODUCTION COSTS
 
 
Production costs are comprised of the following: 
 
 
2018

 
2017

Consumption of raw materials and consumables
 
$
184,484

 
$
160,224

Employee compensation and benefits expense
 
167,879

 
169,109

Contractors and outside services
 
88,475

 
83,012

Utilities
 
26,320

 
24,764

Severance costs related to mine operations
 
—

 
3,509

Other expenses (1)
 
31,417

 
34,339

Changes in inventories (2)
 
17,061

 
25,713

 
 
$
515,636


$
500,670

(1)
Includes closure and decommissioning liability adjustments to reduce production costs by $nil (2017 - reduce by $1.2 million).
(2)
Includes NRV adjustments to inventory to increase production costs by $24.3 million for the year ended December 31, 2018 (2017 - increase by $12.3 million).