Real Estate Acquisitions and Dispositions - Additional Information (Detail)	Jun. 30, 2014
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	83,075
Ansley Village [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	294
Stonefield Commons [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	251
Cityscape at Market Center [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	454
Colonial Village at North Arlington [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	240
Colonial Village at Vista Ridge [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	300