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Write-Downs (Tables)
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Write-Downs
 
 
Year ended December 31,
 
 
2013
 
2012
 
2011
Property, plant, and equipment
 
 
 
 
 
 
Palmarejo
 
$
102,735

 
$

 
$

Kensington
 
48,357

 

 

 
 
151,092

 

 

Mining properties
 
 
 
 
 
 
Palmarejo
 
539,359

 

 

Kensington
 
82,337

 

 

Martha
 
205

 
5,825

 

 
 
621,901

 
5,825

 

 
 
 
 
 
 
 
Total
 
$
772,993

 
$
5,825

 
$