Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Performing Loans Past Due (Details)

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INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Performing Loans Past Due (Details) - Performing Loans - Residential Portfolio Segment
Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 100.00%
Current  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 83.90%
30-59  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 7.00%
60-89  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 2.20%
90-119  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 1.10%
120 or greater  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 5.80%