Segment Reporting Footnote Tagging (Details)	12 Months Ended			6 Months Ended					6 Months Ended		6 Months Ended
	Dec. 31, 2013 segments entities properties	Dec. 31, 2012 properties	Dec. 31, 2013 MF Properties [Member] Unit properties	Jun. 30, 2012 Variable Interest Entity, Primary Beneficiary [Member] Integer	Dec. 31, 2013 Variable Interest Entity, Primary Beneficiary [Member] Integer	Sep. 30, 2012 Variable Interest Entity, Primary Beneficiary [Member] Unit	Dec. 31, 2013 Public housing capital fund trusts [Member] Integer	Sep. 30, 2012 Public housing capital fund trusts [Member] Integer	Jun. 30, 2012 Partnership [Member] Integer	Dec. 31, 2013 Partnership [Member] Unit	Jun. 30, 2012 Variable Interest Entity, Not Primary Beneficiary [Member] Partnership [Member] Integer
Segment Reporting Information [Line Items]
Number of Reportable Segments	5
Number of Available for Sale Securities				2					42		40
Number of Units in Real Estate Property			1,582			410				5,409
Number of Available for Sale Securities, Public Housing Authorities							3	3
Number of Real Estate Properties			8
Number of Variable Interest Entities	4	5			2