INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes Disclosure [Line Items]
Federal statutory tax rate	21.00%		35.00%
Percentage of taxable income offset by tax losses	80.00%
Description of tax credit carryforward	Additionally, the Tax Act modified the rules for REIT net operating losses (NOL). A REIT NOL carryover can now only offset 80 percent of taxable income for losses arising in years beginning after December 31, 2017. The 80 percent limitation is calculated by multiplying current-year REIT taxable income before the dividends paid deduction by 80 percent. Although there is now an annual NOL limitation, the new rules allow post-2017 NOLs to be carried forward indefinitely.
Net operating loss	$ 31,000
Income taxes paid	0	$ 0	$ 0
Net capital loss carryforwards subject to expiration amount	$ 1,300
Capital loss carryforwards, expiration date	Dec. 31, 2019
Capstead REIT [Member]
Income Taxes Disclosure [Line Items]
Net capital loss carryforwards subject to expiration amount	$ 17,500