Real Estate - Acquired Properties From Unaffiliated Parties (Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Purchase price	$ 48,860	$ 1,514,521
Land [Member]
Purchase price	5,500	268,300
Depreciable Property [Member]
Purchase price	$ 43,400	1,229,000
Vacant Land [Member]
Purchase price		16,700
Construction-in-progress [Member]
Purchase price		$ 4,900