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SEGMENTAL INFORMATION - Geographical Segment Data (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Geographical segment data:      
Revenues $ 102,674 $ 106,155 $ 99,828
Kuwait      
Geographical segment data:      
Revenues $ 0 $ 4,182 $ 0