Metal and Other Inventory (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Inventories
Concentrate and dore inventory	$ 11,465	$ 14,855
Other Inventory, Net of Reserves	50,637	52,250
Supplies	65,883	64,918
Metal and other inventory	127,985	132,023
Ore on Leach Pad, Current	50,335	50,495
Ore on Leach Pad Non Current	41,547	31,528
Inventory, Ore Stockpiles on Leach Pads, Gross	91,882	82,023
Inventory and Ore on Leach Pads	$ 219,867	$ 214,046