XML 145 R51.htm IDEA: XBRL DOCUMENT v3.20.1
INVESTMENTS ACCOUNTED FOR AT FAIR VALUE (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
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 $ 654 $ 1,107