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INCOME TAXES (Summary of Income Tax Examinations) (Details) | 12 Months Ended
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Dec. 31, 2014
Indonesia [Member] |
Income Tax Examination [Line Items] |
Additional Open Years Subject To Income Tax Examination | 2010
Peru [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2010
DRC [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2013
Minimum [Member] | U.S. Federal [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2007
Additional Open Years Subject To Income Tax Examination | 2013
Minimum [Member] | Indonesia [Member] |
Income Tax Examination [Line Items] |
Additional Open Years Subject To Income Tax Examination | 2013
Minimum [Member] | Peru [Member] |
Income Tax Examination [Line Items] |
Additional Open Years Subject To Income Tax Examination | 2011
Minimum [Member] | Chile [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2012
Additional Open Years Subject To Income Tax Examination | 2014
Minimum [Member] | DRC [Member] |
Income Tax Examination [Line Items] |
Additional Open Years Subject To Income Tax Examination | 2012
Maximum [Member] | U.S. Federal [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2012
Additional Open Years Subject To Income Tax Examination | 2014
Maximum [Member] | Indonesia [Member] |
Income Tax Examination [Line Items] |
Additional Open Years Subject To Income Tax Examination | 2014
Maximum [Member] | Peru [Member] |
Income Tax Examination [Line Items] |
Additional Open Years Subject To Income Tax Examination | 2014
Maximum [Member] | Chile [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2013
Maximum [Member] | DRC [Member] |
Income Tax Examination [Line Items] |
Additional Open Years Subject To Income Tax Examination | 2014
Period 1 [Member] | Minimum [Member] | Indonesia [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2006
Period 1 [Member] | Maximum [Member] | Indonesia [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2008
Period 2 [Member] | Minimum [Member] | Indonesia [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2011
Period 2 [Member] | Maximum [Member] | Indonesia [Member] |
Income Tax Examination [Line Items] |
Income Tax Examination, Year under Examination | 2012

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