Subsequent Events - Additional Information (Details) $ in Thousands		3 Months Ended
	Apr. 27, 2018 USD ($) Property ApartmentUnit	Mar. 31, 2018 USD ($) Property ApartmentUnit
Subsequent Event [Line Items]
Properties acquired | Property		1
Property Units acquired | ApartmentUnit		117
Purchase Price | $		$ 53,700
Subsequent Event [Member]
Subsequent Event [Line Items]
Properties acquired | Property	1
Property Units acquired | ApartmentUnit	240
Purchase Price | $	$ 146,000