Real Estate - Acquired Properties From Unaffiliated Parties (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Property ApartmentUnit	Dec. 31, 2019 USD ($) Property ApartmentUnit
Properties acquired | Property	1	13
Property Units acquired | ApartmentUnit	158	3,540
Purchase Price	$ 48,860	$ 1,514,521
Rental Properties – Consolidated [Member]
Properties acquired | Property	1	13
Property Units acquired | ApartmentUnit	158	3,540
Purchase Price	$ 48,860	$ 1,494,689
Land Parcels [Member]
Purchase Price		$ 19,832