REAL ESTATE (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	80
Annualized Base Rent | $	$ 11,259
Percentage of Annualized Base Rent	51.20%
Legal Services
Concentration Risk [Line Items]
Number of Tenants | tenant	13
Annualized Base Rent | $	$ 4,547
Percentage of Annualized Base Rent	20.70%
Public Administration
Concentration Risk [Line Items]
Number of Tenants | tenant	6
Annualized Base Rent | $	$ 3,589
Percentage of Annualized Base Rent	16.30%
Professional, Scientific, and Technical Services
Concentration Risk [Line Items]
Number of Tenants | tenant	12
Annualized Base Rent | $	$ 3,123
Percentage of Annualized Base Rent	14.20%