Metal and Other Inventory (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventories
Concentrate and dore inventory	$ 19,151	$ 14,855
Other Inventory, Net of Reserves	52,630	52,250
Supplies	65,863	64,918
Metal and other inventory	137,644	132,023
Ore on Leach Pad, Current	44,964	50,495
Ore on Leach Pad Non Current	46,956	31,528
Inventory, Ore Stockpiles on Leach Pads, Gross	91,920	82,023
Inventory and Ore on Leach Pads	$ 229,564	$ 214,046