Quarterly report pursuant to Section 13 or 15(d)

REAL ESTATE SECURITIES (Narrative) (Details)

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REAL ESTATE SECURITIES (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended
Mar. 31, 2017
Mar. 31, 2017
Mar. 31, 2016
Investment [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value $ 326,878,000 $ 326,878,000  
Other-than-temporary impairment on securities and other investments   0 $ 2,308,000
Proceeds from transaction   286,639,000 $ 361,341,000
Real Estate Securities      
Investment [Line Items]      
Other-than-temporary impairment on securities and other investments   600,000  
Portion of other-than-temporary impairment on securities recognized in other comprehensive income (loss), net of the reversal of other comprehensive loss into net income (loss)   0  
RE Securities Intended to Sell      
Investment [Line Items]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 326,900,000 $ 326,900,000  
FNMA/FHLMC      
Investment [Line Items]      
Face amount of securities sold $ 289,700,000.0    
Average price percentage - sold (as percent) 98.80%    
Proceeds from transaction $ 286,100,000    
Recognized loss on sale of securities 2,800,000    
Repayments of repurchase agreements $ 277,800,000