Noncontrolling Interests - Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Variable interest entity
Net real estate	$ 16,741,673	$ 16,399,997
Total assets	19,785,370	18,554,796
Total liabilities	9,285,582	8,750,638
Primary Beneficiary
Variable interest entity
Net real estate	635,619	654,305
Total assets	721,859	744,394
Total liabilities	$ 52,909	$ 52,087