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TAXATION (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Components of income tax expense:      
Current tax expense (income) $ (27) $ 9,931 $ 4,096
Amortization of tax benefit arising on intra-group transfers of long term assets (3,487) (7,257) (6,687)
Total income tax (gain) expense (3,404) 2,765 (1,705)
Deferred tax assets, noncurrent 421 531  
United Kingdom tax authority
      
Components of income tax expense:      
Current tax expense (income) (27) 2,101 2,733
Deferred tax expense (income) 110 91 886
Statutory tax rate 23.00%    
Deferred tax assets, noncurrent 400 500  
Deferred income tax assets:      
Deferred tax assets, net 421 531  
Indonesia Tax Authority
      
Components of income tax expense:      
Current tax expense (income) 0 6,828 0
Brazil Tax authority
      
Components of income tax expense:      
Current tax expense (income) 0 1,002 1,363
Internal Revenue Service (IRS)
      
Components of income tax expense:      
Minimum resident ownership percentage required for income tax exemption 50.00%    
Foreign country
      
Components of income tax expense:      
Current tax expense (income) $ 0