Summary of Significant Accounting Policies - Noncontrolling Interests, Simon Property Group, Inc. (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Significant Accounting Policies
Limited partners' interests in the Operating Partnership	$ 434,982	$ 447,494
Nonredeemable noncontrolling interests in properties, net	18,446	21,321
Total noncontrolling interests reflected in equity	$ 453,428	$ 468,815