BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, GOODWILL AND INTANGIBLES (Details) (USD $)	9 Months Ended		12 Months Ended	3 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Apr. 30, 2014	Jan. 31, 2015	Jan. 31, 2014
IDENTIFIED INTANGIBLE ASSETS AND INTANGIBLE LIABILITIES AND GOODWILL [Abstract]
New intangible assets	$ 365,000	$ 900,000
Addition to intangible liabilities	0	0
Weighted average lives of intangible assets and intangible liabilities	0 years 6 months	0 years 8 months 12 days
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross, Total	53,898,000		56,710,000	53,898,000
Finite-Lived Intangible Assets, Accumulated Amortization	(25,423,000)		(24,071,000)	(25,423,000)
Finite-Lived Intangible Assets, Net, Total	28,475,000		32,639,000	28,475,000
Indentified intangible liabilities, gross	134,000		173,000	134,000
Indentified intangible liabilities, accumulated amortization	(107,000)		(127,000)	(107,000)
Indentified intangible liabilities, net	27,000		46,000	27,000
Estimated annual amortization [Abstract]
Goodwill	1,940,000		1,100,000	1,940,000
Goodwill impairment	0		0
Goodwill derecognized	11,000	7,000	0
Goodwill added	852,000
Multi Family Residential [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold			2
Commercial Office [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold			3
Commercial Industrial [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold			12
Commercial Retail Property [Member]
Real Estate Properties [Line Items]
Number of real estate properties sold			3
Acquired below-market leases and acquired above-market leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	19,000	32,000		6,000	11,000
Estimated annual amortization [Abstract]
2016			20,000,000
2015			12,000,000
2018			(1,000,000)
2019			(2,000,000)
2020			(1,000,000)
Other identified intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	4,500,000	6,900,000		1,300,000	1,500,000
Estimated annual amortization [Abstract]
2016			4,505,000
2015			4,036,000
2018			3,605,000
2019			3,481,000
2020			$ 3,395,000