Business (Details)	Jun. 30, 2016
Business (Textuals) [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	96.10%
Number of States in which Entity Operates	11
Property/Unit schedule
Properties	315
Apartment Units	79,458
Wholly Owned Properties
Property/Unit schedule
Properties	291
Apartment Units	73,853
Master-Leased Properties – Consolidated
Property/Unit schedule
Properties	3
Apartment Units	853
Partially Owned Properties – Consolidated
Property/Unit schedule
Properties	18
Apartment Units	3,471
Partially Owned Properties – Unconsolidated
Property/Unit schedule
Properties	3
Apartment Units	1,281