XML 103 R84.htm IDEA: XBRL DOCUMENT v3.3.0.814
MINING ASSET IMPAIRMENT AND INVENTORY WRITEDOWN (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
MINING ASSET IMPAIRMENT AND INVENTORY WRITEDOWN [Abstract]      
Mining asset impairment $ 23,242 $ 0 $ 0
Mining inventory writedown $ 16,690 $ 0 $ 0