Annual report pursuant to Section 13 and 15(d)

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

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REAL ESTATE AND OTHER SECURITIES - Schedule of the Outstanding Face Amount and Carrying Value for Securities Uncollectible (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]    
Outstanding Face Amount $ 727,216 $ 5,701,736
Carrying Value $ 280,876 $ 3,830,369