COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - (Details Textuals) $ in Thousands		3 Months Ended			9 Months Ended		12 Months Ended
	Oct. 02, 2017	Sep. 30, 2018 USD ($)	Mar. 31, 2018	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 a
Commitments and Contingencies [Line Items]
Recovery of credit losses		$ 0		$ (6,070)	$ (175)	$ (6,408)
Fund Expense Reimbursements		(100)			(200)
Intercreditor Agreement Claim [Member]
Commitments and Contingencies [Line Items]
Amount sought by third party					300
11333, Inc. Claim [Member]
Commitments and Contingencies [Line Items]
Amount sought by third party					1,200
Hotel [Member] | MacArthur Loan [Member] | MacArthur Place [Member]
Commitments and Contingencies [Line Items]
Debt Instrument, Repayment Guaranty	50.00%
Well Repair [Member]
Commitments and Contingencies [Line Items]
Contractual obligation		$ 2,800			2,800
Development costs incurred in the period					2,100
Mortgage Receivable [Member]
Commitments and Contingencies [Line Items]
Discount on loans acquired						$ 7,000
Annual interest rate of loans acquired			8.50%
Mortgage Loans, Borrower Equity Requirement					9,700
Lloyd's of London [Member] | 11333, Inc. Claim [Member]
Commitments and Contingencies [Line Items]
Amount awarded to other party					1,200
HUB International Insurance Co. [Member] | 11333, Inc. Claim [Member]
Commitments and Contingencies [Line Items]
Amount awarded to other party					100
Preferred Interests [Member] | L’Auberge Fund Manager, LLC [Member]
Commitments and Contingencies [Line Items]
Capital Transaction, Percent of Gross Proceeds, Selling Commissions							6.00%
Capital Transaction, Percent of Gross Proceeds, Expense Reimbursement Broker-Dealer							1.00%
Fund Commissions					$ 100
Pending Litigation [Member] | RNMA I [Member]
Commitments and Contingencies [Line Items]
Loss Contingency, Damages Sought					3.1
NEW MEXICO | Pending Litigation [Member] | Maniatis [Member]
Commitments and Contingencies [Line Items]
Area of Land | a							7,000
TEXAS | Pending Litigation [Member]
Commitments and Contingencies [Line Items]
Area of Land | a							111