Annual report pursuant to Section 13 and 15(d)

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

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REAL ESTATE RELATED AND OTHER LOANS, RESIDENTIAL MORTGAGE LOANS AND SUBPRIME MORTGAGE LOANS - Geographic Distribution (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Aug. 31, 2015
Real Estate Related and other Loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding Face Amount $ 138,148  
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 74,694  
Residential Loans | Residential Mortgage Loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding Face Amount $ 771 $ 3,300
Percentage of loans (as percent) 100.00%  
Residential Loans | Residential Mortgage Loans | Northeastern U.S.    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding Face Amount $ 523  
Percentage of loans (as percent) 67.80%  
Residential Loans | Residential Mortgage Loans | Southeastern U.S.    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding Face Amount $ 248  
Percentage of loans (as percent) 32.20%  
Residential Loans | Residential Mortgage Loans | Foreign    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Outstanding Face Amount $ 0  
Percentage of loans (as percent) 0.00%