Real Estate Assets RE MF Properties (Details)	Feb. 28, 2013 properties	Dec. 31, 2012 Limited Liability Company [Member] properties	Sep. 30, 2012 Limited Liability Company [Member]	Sep. 30, 2012 General Partner [Member]	Dec. 31, 2012 Consolidated Properties [Member] Limited Partner [Member] properties	Dec. 31, 2012 Real Estate [Member] Unit properties	Dec. 31, 2012 Segment, Discontinued Operations [Member] properties	Dec. 31, 2012 NEBRASKA Real Estate [Member] properties	Dec. 31, 2012 KENTUCKY Real Estate [Member] properties	Dec. 31, 2012 INDIANA Real Estate [Member] properties	Dec. 31, 2012 GEORGIA Real Estate [Member] properties	Dec. 31, 2012 TEXAS Real Estate [Member] properties	Dec. 31, 2012 Construction in Progress [Member] Unit parkingstalls	Dec. 31, 2012 Construction in Progress [Member] Wholly Owned Properties [Member] parkingstalls
Other Ownership Interests [Line Items]
Number of Real Estate Properties	3				3	7	2	2	1	1	1	2
Number of Units in Real Estate Property						1,346							475
Number of Parking Stalls													1,605	335
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				1.00%
Noncontrolling Interest, Ownership Percentage by Parent			100.00%		99.00%
Number of Limited Liability Companies		4