ORGANIZATION (Details)	Apr. 30, 2014
ORGANIZATION [Abstract]
Percentage of ordinary taxable income that must be distributed to shareholders (in hundredths)	90.00%
Multi-family residential properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	93
Number of apartment units owned	10,779
Commercial properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	166
Net rentable area (in square feet)	10,500,000