Subsequent Events - Additional Information (Details) $ in Thousands		3 Months Ended
	May 06, 2019 USD ($) Property ApartmentUnit	Mar. 31, 2019 USD ($) Property ApartmentUnit
Subsequent Event [Line Items]
Properties acquired | Property		3
Property Units acquired | ApartmentUnit		579
Purchase Price		$ 258,650
Bonds [Member]
Subsequent Event [Line Items]
Repayments of long-term debt	$ 95,500
Debt Instrument Maturity Date	2036
Subsequent Event
Subsequent Event [Line Items]
Properties acquired | Property	1
Property Units acquired | ApartmentUnit	366
Purchase Price	$ 103,500
Number of properties sold | Property	1
Number of self managed apartments | ApartmentUnit	266
Amount of property sold	$ 237,500