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RELATED PARTY TRANSACTIONS AND FEES (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Related party receivables [Roll Forward]      
Related party receivable at beginning $ 24,672    
Advisory fees (11,082) $ (10,918) $ (9,775)
Net income fee (250) (257) (492)
Related party receivable at end 38,311 24,672  
Pillar Income Asset Management, Inc [Member]      
Related party receivables [Roll Forward]      
Related party receivable at beginning 24,672    
Cash transfers 56,635    
Advisory fees (11,082)    
Net income fee (250)    
Cost reimbursements (3,240) (3,826) $ (3,675)
Interest income 1,196    
Notes receivable purchased (447)    
Fees and commissions (3,082)    
Expenses paid by Advisor (579)    
Financing (mortgage payments) (17,313)    
Sales/purchases transactions (9,818)    
Tax sharing 1,619    
Related party receivable at end $ 38,311 $ 24,672