Segment Reporting Footnote Tagging (Details)	3 Months Ended	12 Months Ended	6 Months Ended
	Dec. 31, 2014 Integer properties entities	Dec. 31, 2014 segments properties entities	Jun. 30, 2013 Integer	Dec. 31, 2013 properties	Sep. 30, 2013 Unit	Dec. 31, 2012 Integer
Segment Reporting Information [Line Items]
Number of Reportable Segments		5
Number of Available for Sale Securities	2
Number of Variable Interest Entities	4	4		6
MF Properties [Member]
Segment Reporting Information [Line Items]
Number of Units in Real Estate Property	2,163	2,163
Number of Real Estate Properties	9	9
Variable Interest Entity, Primary Beneficiary [Member]
Segment Reporting Information [Line Items]
Number of Available for Sale Securities			2
Number of Units in Real Estate Property					410
Number of Variable Interest Entities	2	2
Public housing capital fund trusts [Member]
Segment Reporting Information [Line Items]
Number of Available for Sale Securities, Public Housing Authorities	3	3				3
Partnership [Member]
Segment Reporting Information [Line Items]
Number of Available for Sale Securities			50
Number of Units in Real Estate Property	6,527	6,527
Variable Interest Entity, Not Primary Beneficiary [Member] | Partnership [Member]
Segment Reporting Information [Line Items]
Number of Available for Sale Securities			53