REAL ESTATE PROPERTIES (Details 1) $ in Thousands	12 Months Ended			14 Months Ended
	Sep. 30, 2017 USD ($) property	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Nov. 30, 2017 USD ($)
Real Estate Properties
Balance at the beginning of the period	$ 793,572			$ 793,572
Additions	255,992
Capitalized Costs and Improvements	9,298
Depreciation and Amortization	(30,489)
Sales	(113,552)
Other Dispositions	3,571
Balance at the end of the period	911,250	$ 793,572
Assets removed due to casualty loss	$ (3,571)	0	$ 0
Number of properties owned | property	33
Multi-family residential
Real Estate Properties
Balance at the beginning of the period	$ 783,085			783,085
Additions	255,992
Capitalized Costs and Improvements	9,173
Depreciation and Amortization	(30,379)
Sales	(113,552)
Other Dispositions	3,571
Balance at the end of the period	900,748	783,085
Land
Real Estate Properties
Balance at the beginning of the period	8,021			8,021
Additions	0
Capitalized Costs and Improvements	0
Depreciation and Amortization	0
Sales	0
Other Dispositions	0
Balance at the end of the period	8,021	8,021
Shopping centers/retail | Primary beneficiary | Newark Joint Venture
Real Estate Properties
Balance at the beginning of the period	2,466			2,466
Additions	0
Capitalized Costs and Improvements	125
Depreciation and Amortization	(110)
Sales	0
Other Dispositions	0
Balance at the end of the period	2,481	$ 2,466
Loss from Catastrophes
Real Estate Properties
Assets removed due to casualty loss	$ 3,571
Number of properties owned | property	96
Insurance deductible	$ 100
Estimated insurance recoveries	$ 3,471
Loss from Catastrophes | Subsequent event
Real Estate Properties
Insurance proceeds				$ 1,100