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DEBT - Schedule of Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Lines of credit    
Long-term lines of credit $ 33,711 $ 22,782
Euro revolving loan    
Lines of credit    
Long-term lines of credit 7,211 3,282
Credit Facility | U.S. Dollar revolving loan    
Lines of credit    
Long-term lines of credit $ 26,500 $ 19,500