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Inventory and Ore on Leach Pads (Tables)
 12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventory consists of the following: 
In thousands
December 31, 2015
 
December 31, 2014
Inventory:
 
 
 
Concentrate
$
16,165

 
$
23,563

Precious metals
21,908

 
40,870

Supplies
43,638

 
50,498

 
$
81,711

 
$
114,931

Ore on leach pads:
 
 
 
Current
$
67,329

 
$
48,204

Non-current
44,582

 
37,889

 
$
111,911

 
$
86,093

Total inventory and ore on leach pads
$
193,622

 
$
201,024