Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Schedule of the Outstanding Face Amount and Carrying Value for Securities Uncollectible (Details)

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INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Schedule of the Outstanding Face Amount and Carrying Value for Securities Uncollectible (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]    
Outstanding Face Amount $ 1,179,074 $ 5,701,736
Carrying Value $ 528,741 $ 3,830,369