INCOME TAXES - Taxable Income Reconciliation (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Net income (loss)	$ 11,315,000	$ 2,369,141
REIT Operation
Income Tax Disclosure [Line Items]
Net income (loss)	(12,559,000)		$ (4,645,000)
Five Oaks Investment Corp
Income Tax Disclosure [Line Items]
Net income (loss)	12,829,000		4,707,000
Subsidiaries
Income Tax Disclosure [Line Items]
Net income (loss)	270,000		62,000
Capitalized transaction fees	(10,000)		(41,000)
Unrealized gain (loss)	(50,000)		639,000
Deferred income	52,000		19,000
Tax income of taxable subsidiary before utilization of net operating losses	262,000		679,000
Utilizations of net operating losses	(262,000)		(679,000)
Net tax income of taxable subsidiary	$ 0		$ 0