INVENTORIES (Tables)

9 Months Ended

Sep. 30, 2012

Inventory Disclosure [Abstract]

Schedule of inventories

	As of		As of
	September 30,		December 31,
	2012		2011
Stockpiled ore	$	28,993	$	16,773
In-process	13,122		8,912
Materials and supplies	46,782		48,612
Finished goods	2,979		—
Total	$	91,876	$	74,297