Quarterly report pursuant to Section 13 or 15(d)

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

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INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Geographic Distribution of Residential Mortgage Loans (Details) (Residential Mortgage Loans Held-for-Investment)
Sep. 30, 2014
Dec. 31, 2013
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 100.00% 100.00%
California
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 23.00% 5.70%
New York
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 16.70% 22.00%
New Jersey
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 8.30% 6.90%
Illinois
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 5.80% 7.70%
Florida
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 4.50% 21.20%
Maryland
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 4.00% 2.80%
Connecticut
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 3.30% 3.90%
Massachusetts
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 3.10% 4.10%
Washington
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 3.00% 3.90%
Pennsylvania
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 2.90% 0.90%
Other U.S.
   
Mortgage Loans on Real Estate [Line Items]    
Total outstanding (percent) 25.40% 20.90%