Quarterly report pursuant to Section 13 or 15(d)

REAL ESTATE RELATED AND OTHER LOANS AND RESIDENTIAL MORTGAGE LOANS (Geographic Distribution) (Details)

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REAL ESTATE RELATED AND OTHER LOANS AND RESIDENTIAL MORTGAGE LOANS (Geographic Distribution) (Details)
$ in Thousands
Jun. 30, 2017
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount $ 145,244
Real Estate Related and Other Loans  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount $ 145,244
Percentage of loans (as percent) 100.00%
Real Estate Related and Other Loans | Northeastern U.S.  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percentage of loans (as percent) 0.00%
Real Estate Related and Other Loans | Southeastern U.S.  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percentage of loans (as percent) 0.00%
Real Estate Related and Other Loans | Foreign  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percentage of loans (as percent) 100.00%
Real Estate Related and Other Loans | Real Estate  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount $ 63,454
Real Estate Related and Other Loans | Real Estate | Northeastern U.S.  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount 0
Real Estate Related and Other Loans | Real Estate | Southeastern U.S.  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount 0
Real Estate Related and Other Loans | Real Estate | Foreign  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount 63,454
Real Estate Related and Other Loans | Other | Other  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount 81,790
Residential | Residential Mortgage Loans  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount $ 628
Percentage of loans (as percent) 100.00%
Residential | Residential Mortgage Loans | Northeastern U.S.  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount $ 523
Percentage of loans (as percent) 83.30%
Residential | Residential Mortgage Loans | Southeastern U.S.  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount $ 105
Percentage of loans (as percent) 16.70%
Residential | Residential Mortgage Loans | Foreign  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Outstanding Face Amount $ 0
Percentage of loans (as percent) 0.00%