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RELATED PARTY TRANSACTIONS AND FEES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Related Party Transactions [Abstract]      
Advisory fee $ 685 $ 660 $ 639
Net income fee 631 250 257
Related party fees 1,316 910 896
Cost reimbursements 284 234 213
Interest received $ 3,086 $ 1,903 $ 1,484