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MORTGAGE LOANS, NET (Details Textual)
12 Months Ended
Dec. 31, 2017
USD ($)
Loan
Dec. 31, 2016
USD ($)
Loan
Dec. 31, 2015
USD ($)
Mortgage Loans on Real Estate [Line Items]      
Mortgage loan repayments $ 0 $ 7,632,000  
Number of performing loans | Loan   2  
Discount given to collect loan principal   $ 200,000  
Mortgage Loans On Real Estate Number Of Loans Sold (in loans) | Loan 0 1  
Sale of mortgage loans   $ 3,148,000  
Sales of mortgage loans net of sales costs   3,100,000  
Sale of mortgage loans   3,287,000  
Loss on sale of loans   (100,000)  
Mortgage loans acquired through recoveries $ 19,875,000    
Principal collected $ 0 $ 7,843,000  
Total Number Of Loans (in loans) | Loan 4 3  
Maximum Percentage Of Mortgage Loan Issuance To Single Borrower (in percentage) 20.00%    
Long-term Debt, Gross $ 34,551,000    
Mortgage Loans Held for Sale 19,668,000 $ 378,000  
Mortgage loan income 944,000 340,000  
Allowance for Loan and Lease Losses, Real Estate 12,682,000 12,682,000 $ 12,892,000
Mortgage Loan Borrowing Group [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans On Real estate Outstanding Principal Amount $ 19,700,000 $ 400,000  
Mortgage Loans On Real Estate Outstanding Principal Percentage (in percentage) 100.00% 100.00%  
Mortgage Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Total Number Of Loans (in loans) | Loan 4 3  
Mortgage Loans on Real Estate, Carrying Amount of Mortgages $ 8,200,000 $ 4,400,000  
Loans receivable valuation allowance (percentage) 39.20% 97.10%  
Mortgage Loans On Real estate Outstanding Principal Amount $ 32,400,000 $ 13,100,000  
Number of extensions available for loans acquired 3    
Allowance for Loan and Lease Losses, Real Estate $ 12,700,000    
Mortgage Receivable [Member] | Minimum [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans on Real Estate, Interest Rate (in percentage) 8.70% 11.00%  
Mortgage Receivable [Member] | Maximum [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans on Real Estate, Interest Rate (in percentage) 12.00% 12.00%  
Nonperforming Financing Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans on Real Estate, Carrying Amount of Mortgages $ 0    
Mortgage Loans Weighted Average Interest Rate (in percentage) 12.00% 12.00%  
Mortgage Loans On Real estate Outstanding Principal Amount $ 12,700,000    
Mortgage Loans On Real Estate Number Of Loans, Outstanding Principal Balance (in loans) | Loan 2 2  
Nonperforming Financing Receivable [Member] | Mortgage Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans on Real Estate, Carrying Amount of Mortgages $ 0    
Mortgage Loans On Real estate Outstanding Principal Amount   $ 12,700,000  
Performing Financing Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans On Real estate Outstanding Principal Amount $ 19,700,000 $ 400,000  
Mortgage Loans on Real Estate, Interest Rate (in percentage) 9.70% 11.00%  
Mortgage Loans On Real Estate Number Of Loans, Outstanding Principal Balance (in loans) | Loan 2 1  
Performing Financing Receivable [Member] | Three Individual Mortgage Loan [Member]      
Mortgage Loans on Real Estate [Line Items]      
Total Number Of Loans (in loans) | Loan 2 3  
Mortgage Loans On Real estate Outstanding Principal Amount $ 19,500,000 $ 3,500,000  
Mortgage Loans Income Percentage (in percentage) 96.90% 99.20%  
Performing Financing Receivable [Member] | Mortgage Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Total Number Of Loans (in loans) | Loan 2 1  
Mortgage Loans on Real Estate, Carrying Amount of Mortgages $ 10,000,000 $ 400,000  
Mortgage Loans Weighted Average Interest Rate (in percentage) 9.70% 11.00%  
LIBOR [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans On Real Estate Interest Prime Rate (in percentage)   0.77%  
Prime Rate [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans On Real Estate Interest Prime Rate (in percentage) 4.50% 3.75%  
Mezzanine Loan One [Member] | Mortgage Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans On Real Estate Interest Prime Rate (in percentage) 9.75%    
Mortgage Loans on Real Estate, Interest Rate (in percentage) 11.23%    
Mezzanine Loan One [Member] | LIBOR [Member] | Mortgage Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Variable rate (percent) 11.227%    
Mezzanine Loan Two [Member] | Mortgage Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Mortgage Loans On Real Estate Interest Prime Rate (in percentage) 7.25%    
Mortgage Loans on Real Estate, Interest Rate (in percentage) 8.73%    
Number of extensions available for loans acquired 3    
Mezzanine Loan Two [Member] | LIBOR [Member] | Mortgage Receivable [Member]      
Mortgage Loans on Real Estate [Line Items]      
Variable rate (percent) 8.727%