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INVESTMENTS ACCOUNTED FOR AT FAIR VALUE (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments accounted for at fair value $ 1,107  
Percentage of fair value investment 16.50%  
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments accounted for at fair value $ 1,107 $ 903