RELATED PARTY TRANSACTIONS - Management Agreement (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Due to affiliates	$ 762,000		$ 762,000		$ 566,000
Bimini Advisors, LLC [Member]
Related Party Transaction [Line Items]
Termination Date			2/20/2018
Automatic Renewal Period Of Management Agreement			1 year
Management Fees And Allocated Expenses	$ 1,940,000	$ 1,389,000	$ 5,398,000	$ 3,931,000
Bimini Advisors, LLC [Member] | First $250 million of Equity [Member]
Related Party Transaction [Line Items]
Annual management fee as a percent of equity			1.50%
Bimini Advisors, LLC [Member] | Greater than $250 million but less than or equal to $500 million Equity [Member]
Related Party Transaction [Line Items]
Annual management fee as a percent of equity			1.25%
Bimini Advisors, LLC [Member] | Greater than $500 million of Equity [Member]
Related Party Transaction [Line Items]
Annual management fee as a percent of equity			1.00%