Noncontrolling Interests - Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Variable interest entity
Net real estate	$ 17,466,152	$ 16,399,997
Total assets	20,740,285	18,554,796
Total liabilities	9,722,555	8,750,638
Primary beneficiary
Variable interest entity
Net real estate	635,963	654,305
Total assets	723,668	744,394
Total liabilities	$ 47,962	$ 52,087