Annual report pursuant to Section 13 and 15(d)

REAL ESTATE SECURITIES - Narrative (Details)

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REAL ESTATE SECURITIES - Narrative (Details)
12 Months Ended
Dec. 31, 2018
USD ($)
security
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Investments, Debt and Equity Securities [Abstract]      
Other-than-temporary impairment charges (OTTI) | $ $ 0 $ 600,000 $ 23,100,000
Securities in an unrealized loss position | security 0