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
Jun. 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 85.20%
30-59  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 6.80%
60-89  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 1.50%
90-119  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 0.80%
Financing Receivables, Equal to Greater than 120 Days Past Due  
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Percent past due 5.70%