REAL ESTATE HELD FOR INVESTMENT (Highes Tenant Industry Concentrations- Grater than 10% of Annual Base Rent) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) tenant
Concentration Risk [Line Items]
Number of Tenants | tenant	229
Annualized Base Rent | $	$ 21,690
Percentage of Annualized Base Rent	39.20%
Insurance
Concentration Risk [Line Items]
Number of Tenants | tenant	26
Annualized Base Rent | $	$ 7,817
Percentage of Annualized Base Rent	14.10%
Health Care and Social Services
Concentration Risk [Line Items]
Number of Tenants | tenant	16
Annualized Base Rent | $	$ 7,021
Percentage of Annualized Base Rent	12.70%
Computer Systems
Concentration Risk [Line Items]
Number of Tenants | tenant	24
Annualized Base Rent | $	$ 6,852
Percentage of Annualized Base Rent	12.40%