Acquisition - Narrative (Details)	Jun. 30, 2019 unit	Jun. 24, 2019 ft² unit	Feb. 12, 2019 ft² unit
Business Acquisition [Line Items]
Number of Units	1,360
Wimbledon Oaks | Arlington, Texas
Business Acquisition [Line Items]
Number of Units			248
Area of property (in square feet) | ft²			189,960
Percentage of area leased (as percent)	90.00%
Summit | Alexandria, Virginia
Business Acquisition [Line Items]
Number of Units		141
Area of property (in square feet) | ft²		164,140
Percentage of area leased (as percent)	94.00%