Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Summary of Unpaid Principal Balance and Carrying Value for Loans Uncollectible (Details)

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INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Summary of Unpaid Principal Balance and Carrying Value for Loans Uncollectible (Details) - PCD Loans [Member] - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Mortgage Loans on Real Estate [Line Items]    
Unpaid Principal Balance $ 319,239 $ 203,673
Carrying Value $ 230,323 $ 190,761