Annual report pursuant to Section 13 and 15(d)

REAL ESTATE SECURITIES - Real Estate Securities Holdings (Details)

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REAL ESTATE SECURITIES - Real Estate Securities Holdings (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Dec. 31, 2016
USD ($)
security
Dec. 31, 2017
USD ($)
security
Dec. 31, 2016
USD ($)
security
Dec. 31, 2015
USD ($)
Investment [Line Items]        
Other-Than- Temporary- Impairment $ 0   $ 0 $ (3,010)
Amortized Cost Basis   $ 924    
Carrying Value   2,294    
OTTI recorded 23,100 600 23,100 $ 2,400
Total outstanding face amount of fixed rate securities 619,800 0 619,800  
Total outstanding face amount of floating rate securities 4,000 4,000 4,000  
Total Securities, Available-for-Sale        
Investment [Line Items]        
Outstanding Face Amount 623,808 4,000 623,808  
Before Impairment 652,735 2,445 652,735  
Other-Than- Temporary- Impairment (24,649) (1,521) (24,649)  
Amortized Cost Basis 628,086 924 628,086  
Gains 1,168 1,370 1,168  
Losses 0 0 0  
Carrying Value $ 629,254 $ 2,294 $ 629,254  
Number of Securities | security 16 1 16  
Coupon   1.94%    
Yield   22.69%    
Weighted Average Life (Years)   7 years 6 months 1 day    
ABS - Non-Agency RMBS | Total Securities, Available-for-Sale        
Investment [Line Items]        
Outstanding Face Amount $ 4,000 $ 4,000 $ 4,000  
Before Impairment 2,303 2,445 2,303  
Other-Than- Temporary- Impairment (1,521) (1,521) (1,521)  
Amortized Cost Basis 782 924 782  
Gains 1,168 1,370 1,168  
Losses 0 0 0  
Carrying Value $ 1,950 $ 2,294 $ 1,950  
Number of Securities | security 1 1 1  
Coupon   1.94% 1.15%  
Yield   22.69% 25.45%  
Weighted Average Life (Years)   7 years 6 months 1 day 9 years  
Principal Subordination 27.90% 33.00% 27.90%  
FNMA/FHLMC | Total Securities, Available-for-Sale        
Investment [Line Items]        
Outstanding Face Amount $ 619,808   $ 619,808  
Before Impairment 650,432   650,432  
Other-Than- Temporary- Impairment (23,128)   (23,128)  
Amortized Cost Basis 627,304   627,304  
Gains 0   0  
Losses 0   0  
Carrying Value $ 627,304   $ 627,304  
Number of Securities | security 15   15  
Coupon     3.28%  
Yield     2.65%  
Weighted Average Life (Years)     8 years 5 months