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PROPERTY, PLANT AND EQUIPMENT Rollforward (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Movement in Property, Plant and Equipment [Roll Forward]    
Opening Balance $ 217,367 $ 250,902
Additions 11,340 14,321
Disposals (120) (803)
Depreciation (20,942) (27,910)
Other Movements (1,763) (1,285)
Ending Balance 198,312 258,968
Foreign Currency Translation Movements [Member]
   
Movement in Property, Plant and Equipment [Roll Forward]    
Foreign currency movements $ (7,570) $ 23,743