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Inventory and Ore on Leach Pads (Tables)
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
In thousands
December 31, 2016
 
December 31, 2015
Inventory:
 
 
 
Concentrate
$
17,994

 
$
16,165

Precious metals
47,228

 
21,908

Supplies
40,804

 
43,638

 
$
106,026

 
$
81,711

Ore on leach pads:
 
 
 
Current
$
64,167

 
$
67,329

Non-current
67,231

 
44,582

 
$
131,398

 
$
111,911

Total inventory and ore on leach pads
$
237,424

 
$
193,622