Real Estate Properties (Details) ft² in Thousands		3 Months Ended		9 Months Ended
	Dec. 31, 2014 USD ($) property	Jun. 30, 2015 USD ($) ft² property	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) ft² property	Jun. 30, 2014 USD ($)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the beginning of the period				$ 635,612,000
Additions				27,950,000
Capitalized Costs and Improvements				49,704,000
Sales and other reductions				(6,828,000)
Depreciation and Amortization				(14,296,000)
Transfer to Held for Sale				(68,259,000)
Balance at the end of the period		$ 623,883,000		623,883,000
Property acquisition costs		0	$ 718,000	295,000	$ 2,246,000
Multi-family
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the beginning of the period				511,866,000
Additions				27,950,000
Capitalized Costs and Improvements				26,613,000
Sales and other reductions				(6,753,000)
Depreciation and Amortization				(12,561,000)
Transfer to Held for Sale				(68,259,000)
Balance at the end of the period		478,856,000		478,856,000
Multi-family | Mortgages [Member] | Pensacola, FL [Member] | Property Acquisition [Member] | Affiliated Entity [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Number of units (properties) | property	276
Contract purchase price	$ 27,950,000
Debt note	17,173,000
Payments to acquire interest in property	11,380,000
Property acquisition costs	295,000
Closing adjustments	$ 308,000
Commercial/mixed use | Variable Interest Entity Primary Beneficiary [Member] | RBHTRB Newark Holdings LLC [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the beginning of the period				113,021,000
Additions				0
Capitalized Costs and Improvements				23,087,000
Sales and other reductions				0
Depreciation and Amortization				(1,655,000)
Transfer to Held for Sale				0
Balance at the end of the period		$ 134,453,000		$ 134,453,000
Commercial/mixed use | Newark NJ [Member] | Variable Interest Entity Primary Beneficiary [Member] | RBHTRB Newark Holdings LLC [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Number of units (properties) | property		61		61
Areas of real estate (in sqft) | ft²		690		690
Commercial/mixed use | Construction in Progress [Member] | Newark NJ [Member] | Variable Interest Entity Primary Beneficiary [Member] | RBHTRB Newark Holdings LLC [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Number of units (properties) | property		143		143
Areas of real estate (in sqft) | ft²		26		26
Commercial/mixed use | Mortgages [Member] | Newark NJ [Member] | Variable Interest Entity Primary Beneficiary [Member] | RBHTRB Newark Holdings LLC [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Notes payable		$ 19,500,000		$ 19,500,000
Land
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the beginning of the period				7,972,000
Additions				0
Capitalized Costs and Improvements				0
Sales and other reductions				0
Depreciation and Amortization				0
Transfer to Held for Sale				0
Balance at the end of the period		7,972,000		7,972,000
Shopping centers/Retail | Variable Interest Entity Primary Beneficiary [Member] | RBHTRB Newark Holdings LLC [Member]
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the beginning of the period				2,678,000
Additions				0
Capitalized Costs and Improvements				4,000
Sales and other reductions				0
Depreciation and Amortization				(80,000)
Transfer to Held for Sale				0
Balance at the end of the period		2,602,000		2,602,000
Co-op/condo apartments
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at the beginning of the period				75,000
Additions				0
Capitalized Costs and Improvements				0
Sales and other reductions				(75,000)
Depreciation and Amortization				0
Transfer to Held for Sale				0
Balance at the end of the period		$ 0		$ 0