Quarterly report pursuant to Section 13 or 15(d)

REAL ESTATE SECURITIES (Securities in Unrealized Loss Position) (Details)

v3.7.0.1
REAL ESTATE SECURITIES (Securities in Unrealized Loss Position) (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
USD ($)
security
Mar. 31, 2016
USD ($)
Investment [Line Items]    
After Impairment - Amortized Cost Basis $ 817  
Gross unrealized losses, less than twelve months 326,878  
Gross unrealized losses, twelve months or more 0  
Gross unrealized losses $ 326,878  
Number of securities, less than twelve months (in securities) | security 1  
Number of securities, twelve months or more (in securities) | security 0  
Number of securities (in securities) | security 1  
Realized/unrealized loss on investments $ 3,389 $ 2,007
FNMA/FHLMC    
Investment [Line Items]    
Outstanding Face Amount 319,380  
Amortized Cost Basis Other -Than-Temporary Impairment (11,094)  
After Impairment - Amortized Cost Basis 326,878  
Gross Unrealized Gains 0  
Gross Unrealized Losses $ 0  
Weighted Average Rating AAA  
Weighted Average Coupon (as percent) 3.50%  
Weighted Average Yield (as percent) 3.13%  
Weighted Average Life (Years) 7 years 8 months 1 day  
FNMA/FHLMC | Reclassification from AOCI into earnings | Unrealized loss on real estate securities, intent-to-sell, reclassified from AOCI into income    
Investment [Line Items]    
Realized/unrealized loss on investments $ 11,100  
Securities in an Unrealized Loss Position    
Investment [Line Items]    
Outstanding Face Amount 319,380  
Amortized Cost Basis - Before Impairment 337,972  
Amortized Cost Basis Other -Than-Temporary Impairment (11,094)  
After Impairment - Amortized Cost Basis 326,878  
Gross Unrealized Gains 0  
Gross Unrealized Losses $ 0  
Weighted Average Rating AAA  
Weighted Average Coupon (as percent) 3.50%  
Weighted Average Yield (as percent) 3.13%  
Weighted Average Life (Years) 7 years 8 months 1 day  
Less Than Twelve Months    
Investment [Line Items]    
Outstanding Face Amount $ 319,380  
Amortized Cost Basis - Before Impairment 337,972  
Amortized Cost Basis Other -Than-Temporary Impairment (11,094)  
After Impairment - Amortized Cost Basis 326,878  
Gross Unrealized Gains 0  
Gross Unrealized Losses $ 0  
Weighted Average Rating AAA  
Weighted Average Coupon (as percent) 3.50%  
Weighted Average Yield (as percent) 3.13%  
Weighted Average Life (Years) 7 years 8 months 1 day  
Twelve or More Months    
Investment [Line Items]    
Outstanding Face Amount $ 0  
Amortized Cost Basis - Before Impairment 0  
Amortized Cost Basis Other -Than-Temporary Impairment 0  
After Impairment - Amortized Cost Basis 0  
Gross Unrealized Gains 0  
Gross Unrealized Losses $ 0  
Weighted Average Coupon (as percent) 0.00%  
Weighted Average Yield (as percent) 0.00%