INCOME TAXES (Summary of Income Tax Examinations) (Details)	12 Months Ended
	Dec. 31, 2012
Indonesia [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2011
Additional Open Years Subject To Income Tax Examination	2012
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	2011
Minimum [Member] | Indonesia [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2005
Additional Open Years Subject To Income Tax Examination	2009
Minimum [Member] | Peru [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2002
Additional Open Years Subject To Income Tax Examination	2011
Minimum [Member] | Chile [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2010
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	2010
Additional Open Years Subject To Income Tax Examination	2012
Maximum [Member] | Indonesia [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2008
Additional Open Years Subject To Income Tax Examination	2010
Maximum [Member] | Peru [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2010
Additional Open Years Subject To Income Tax Examination	2012
Maximum [Member] | Chile [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2011