Business (Details)	Dec. 31, 2013
Property/Unit schedule
Wholly Owned Properties	362
Master Leased Properties Acquired	3
Partially Owned Consolidated Properties	19
Partially Owned Unconsolidated Properties	4
Military Housing Properties	2
Wholly Owned Units	98,468
Master Leased Units	853
Partially Owned Consolidated Units	3,752
Partially Owned Unconsolidated Units	1,669
Military Housing Units	5,113
Business (Textuals) [Abstract]
Number of operating properties under long-term ground leases	13
Number of land parcels under long-term ground leases	1
Noncontrolling Interest, Ownership Percentage by Parent	96.20%
Number of Real Estate Properties	390
Number of Units in Real Estate Property	109,855
Number of States in which Entity Operates	12