Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Summary of the Geographic Distribution of the Underlying Residential Mortgage Loans (Details)

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INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Summary of the Geographic Distribution of the Underlying Residential Mortgage Loans (Details) - Residential Mortgage Loans Held-for-Investment [Member]
Jun. 30, 2015
Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 100.00% 100.00%
New Jersey [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 17.80% 7.00%
New York [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 16.50% 12.20%
Florida [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 8.40% 6.30%
California [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 6.40% 15.00%
Maryland [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 4.10% 3.40%
Illinois [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.70% 4.40%
Pennsylvania [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.40% 3.90%
Massachusetts [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 3.30% 2.40%
Washington [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 2.90% 3.00%
Oregon [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 2.70% 1.50%
Other U.S. [Member]    
Mortgage Loans on Real Estate [Line Items]    
Percentage of Total Outstanding Unpaid Principal Amount as of 30.80% 40.90%