Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Additional Information (Details)

v3.10.0.1
INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Debt Securities, Available-for-sale [Line Items]        
Other-than-temporary impairment $ 3,889 $ 1,509 $ 23,190 $ 8,736
Real estate securities acquired with credit quality deterioration, face amount     1,444,700  
Real estate securities acquired with credit quality deterioration, expected cash flows     1,271,900  
Real estate securities acquired with credit quality deterioration, fair value     965,600  
Agency RMBS        
Debt Securities, Available-for-sale [Line Items]        
Face amount of securities sold, unsettled 3,400,000   3,400,000  
Face amount of securities purchased 1,800,000   1,800,000  
Proceeds from sale of AFS, unsettled 3,400,000   3,400,000  
Purchase of real estate securities, unsettled 1,800,000   1,800,000  
Non-Agency        
Debt Securities, Available-for-sale [Line Items]        
Face amount of securities sold, unsettled 15,100   15,100  
Purchase of real estate securities, unsettled $ 13,500   $ 13,500