RENTALS UNDER OPERATING LEASES Narrative (Details)	1 Months Ended		3 Months Ended			9 Months Ended
	Nov. 12, 2020 agreement	Oct. 31, 2020	Sep. 30, 2020 Property tenant	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2020 Property tenant agreement	Sep. 30, 2019 Property tenant
Lessor, Lease, Description [Line Items]
Number of real estate properties owned			14			14	13
Number of tenants | tenant			59			59	59
Percentage of lease revenue collected			99.00%	94.00%	100.00%
Number of rent deferral agreements | agreement						5
Percentage of base rent						1.00%
Lessor, Operating Lease, Lease Income, Abatement Request, Percentage of Base Rent						0.10%
Rent deferral period			12 months
Subsequent Event
Lessor, Lease, Description [Line Items]
Percentage of lease revenue collected		99.00%
Number of rent deferral agreements | agreement	2
Percentage of base rent	0.10%
Rent deferral period	12 months
Office Building
Lessor, Lease, Description [Line Items]
Number of real estate properties owned			4			4	4
Medical Office Property
Lessor, Lease, Description [Line Items]
Number of real estate properties owned			1			1	1
Retail Property
Lessor, Lease, Description [Line Items]
Number of real estate properties owned			4			4	4
Industrial Property
Lessor, Lease, Description [Line Items]
Number of real estate properties owned			5			5	4
Student Housing
Lessor, Lease, Description [Line Items]
Number of real estate properties owned			1			1	1
Number of tenants | tenant			316			316	316