RELATED-PARTY TRANSACTIONS AND ARRANGEMENTS (Operating Expenses) (Details) - Operating Expenses - Advisors	12 Months Ended
	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Related party transaction reimbursement of expenses deferred	$ 567,000
Minimum
Related Party Transaction [Line Items]
Reimbursement of related party expense threshold, percent of average invested assets	2.00%
Reimbursement of related party expense threshold, percent of net income	25.00%