USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES Summary of Loan and Borrowing Characteristics (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Collateralized loan obligations	$ 503,978,918	$ 0
Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Collateralized loan obligations	503,978,918
Face Amount
Variable Interest Entity [Line Items]
Collateralized loan obligations	510,181,000	1,234,522,000
Face Amount | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Unpaid Principal Balance	550,555,503
Collateralized loan obligations	510,181,000
Carrying Value
Variable Interest Entity [Line Items]
Collateralized loan obligations	503,978,918	$ 1,234,522,000
Carrying Value | Hunt CRE 2017-FL1, Ltd.
Variable Interest Entity [Line Items]
Carrying Value	550,555,503
Collateralized loan obligations	$ 503,978,918