Acquisitions and Joint Venture Investments - Schedule of Asset Acquisitions (Details) - Bed	Dec. 31, 2019	Nov. 30, 2019	Aug. 31, 2019
Property, Plant and Equipment [Line Items]
Number of beds	112,800
In-process development properties
Property, Plant and Equipment [Line Items]
Number of beds	783
In-process development properties | The Flex at Stadium Centre
Property, Plant and Equipment [Line Items]
Number of beds			340
In-process development properties | 959 Franklin
Property, Plant and Equipment [Line Items]
Number of beds		443