Significant Customers Significant Customers (Tables)

12 Months Ended

Dec. 31, 2012

Significant Customers [Abstract]

Schedule of Significant Customers

The following table indicates customers that represent 10% or more of total sales of metal for the years December 31, 2012, 2011, and 2010 (in millions):

Customer	Year ended December 31, 2012	Year ended December 31, 2011	Year ended December 31, 2010	Segments reporting revenue
Valcambi	$414.4	$385.5	$174.1	Palmarejo, San Bartolomé
Auramet	94.6	50.8	79.0	Palmarejo
Penoles	0.3	13.3	53.9	Martha
China Gold	43.8	108.9	23.6	Kensington
International Commodities	58.0	112.6	36.7	Palmarejo, San Bartolomé, Rochester
Mitsui	65.6	105.1	45.9	Palmarejo, San Bartolomé, Rochester