ORGANIZATION (Details) ft² in Millions	Oct. 31, 2016 ft² item property
Real Estate Properties [Line Items]
Percentage of ordinary taxable income that must be distributed to shareholders (in hundredths)	90.00%
Medical Property [Member]
Real Estate Properties [Line Items]
Number of real estate properties	30
Net rentable area (in square feet) | ft²	2.7
Medical Property [Member] | Discontinued Operations, Held-for-sale [Member]
Real Estate Properties [Line Items]
Number of real estate properties	27
Retail [Member] | Discontinued Operations, Held-for-sale [Member]
Real Estate Properties [Line Items]
Number of real estate properties	2
Other Property [Member]
Real Estate Properties [Line Items]
Number of real estate properties	14
Multi-family Residential Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	86
Number of apartment units owned | item	12,751
Multi-family Residential Properties [Member] | Discontinued Operations, Held-for-sale [Member]
Real Estate Properties [Line Items]
Number of real estate properties	14
Unimproved Land [Member] | Discontinued Operations, Held-for-sale [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1