Real Estate Properties (Details) (USD $)	9 Months Ended						9 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Shopping centers/Retail	Jun. 30, 2013 Coop/Condo Apartments	Jun. 30, 2013 Commercial/Mixed Use Primary beneficiary Newark Joint Venture	Jun. 30, 2013 Commercial/Mixed Use Primary beneficiary Newark Joint Venture Mortgages Payable	Sep. 30, 2012 Commercial/Mixed Use Primary beneficiary Newark Joint Venture Mortgages Payable	Jun. 30, 2013 Multi-Family	Jun. 30, 2013 Land	Sep. 30, 2012 Land
Movement in real estate properties owned
Balance at the beginning of the period	$ 190,317,000	$ 2,749,000	$ 250,000	$ 61,808,000			$ 117,538,000	$ 7,972,000	$ 7,972,000
Additions	136,403,000			375,000			136,028,000
Costs Capitalized and Improvements	27,056,000			24,171,000			2,885,000
Depreciation, Amortization and Other Reductions	(4,785,000)	(78,000)	(65,000)	(457,000)			(4,185,000)
Balance at the end of the period	348,991,000	2,671,000	185,000	85,897,000			252,266,000	7,972,000	7,972,000
Blanket mortgage on assets					$ 20,100,000	$ 20,100,000