ORGANIZATION (Details) ft² in Millions	Jan. 31, 2016 ft² Property Unit
ORGANIZATION [Abstract]
Percentage of ordinary taxable income that must be distributed to shareholders	90.00%
Multi-family Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	94
Number of apartment units owned | Unit	12,401
Multi-family Properties [Member] | Held for Sale [Member]
Real Estate Properties [Line Items]
Number of real estate properties	8
Commercial Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	83
Net rentable area | ft²	4.5
Commercial Properties [Member] | Held for Sale [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1
Unimproved Land [Member] | Held for Sale [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1