Significant Customers (Details)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Significant Customers (Textual) [Abstract]
Approximate percentage of sales of metals to counterparties companies related to metal sales	81.00%	83.00%
Approximate percentage of sales of silver concentrates to third-party smelters related to metal sales	19.00%	17.00%