Noncontrolling Interests - Variable Interest Entities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Variable interest entity
Net real estate	$ 16,502,311	$ 16,399,997
Total assets	19,102,547	18,554,796
Total liabilities	8,728,628	8,750,638
Primary Beneficiary
Variable interest entity
Net real estate	640,302	654,305
Total assets	731,943	744,394
Total liabilities	$ 51,688	$ 52,087