Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Realized and unrealized (gain) loss on investments and other income, net) (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Realized and unrealized (gain) loss on investments and other income, net) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Realized and unrealized (gain) loss on investments    
Loss on settlement of real estate securities $ 0 $ 2,803
Unrealized loss on securities, intent-to-sell 0 558
Realized (gain) on settlement of TBAs, net 0 (2,474)
Unrealized (gain) loss on non-hedge derivative instruments (242) 2,502
Realized and unrealized (gain) loss on investments (242) 3,389
Other loss, net    
Loss on lease modifications and terminations (771) (158)
Loss on extinguishment of debt, net (52) (146)
Collateral management fee income, net 154 122
Equity in earnings of equity method investments 379 379
(Loss) gain on disposal of long-lived assets (206) 26
Other income (loss) 90 (346)
Other loss, net $ (406) $ (123)