Significant Accounting Policies - Noncontrolling Interests, Simon Property Group, Inc. (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Significant Accounting Policies
Limited partners' interests in the Operating Partnership	$ 408,371	$ 448,076
Nonredeemable noncontrolling interests in properties, net	20,563	25,052
Total noncontrolling interests reflected in equity	$ 428,934	$ 473,128