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RELATED PARTY TRANSACTIONS AND FEES (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Related Party Transactions [Abstract]      
Advisory fee $ 660 $ 639 $ 704
Net income fee 250 257 187
Related party fees 910 896 891
Cost reimbursements 234 213 240
Interest received $ 1,903 $ 1,484 $ 1,636