Business (Details)	Sep. 30, 2015
Noncontrolling Interest, Ownership Percentage by Parent	96.20%
Number of Real Estate Properties	392
Number of States in which Entity Operates	12
Number of Units in Real Estate Property	109,347
Wholly Owned Properties [Member]
Number of Real Estate Properties	365
Number of Units in Real Estate Property	98,331
Master-Leased Properties [Member]
Number of Real Estate Properties	3
Number of Units in Real Estate Property	853
Partially Owned Properties [Member]
Number of Real Estate Properties	19
Number of Units in Real Estate Property	3,771
Unconsolidated Properties [Member]
Number of Real Estate Properties	3
Number of Units in Real Estate Property	1,281
Military Housing [Member]
Number of Real Estate Properties	2
Number of Units in Real Estate Property	5,111