Segments (Summary of Assets by Segment and Reconciliation of Segment Assets to Total Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Reconciliation of total segment assets to total assets
Assets	$ 9,580,132	$ 9,603,463
Operating segments
Reconciliation of total segment assets to total assets
Assets	9,317,639	9,247,608
Operating segments | Operating Assets Segment
Reconciliation of total segment assets to total assets
Assets	3,464,019	3,448,823
Operating segments | MPC Segment
Reconciliation of total segment assets to total assets
Assets	3,255,892	3,272,655
Operating segments | Seaport Segment
Reconciliation of total segment assets to total assets
Assets	1,162,486	1,166,950
Operating segments | Strategic Developments Segment
Reconciliation of total segment assets to total assets
Assets	1,435,242	1,359,180
Corporate
Reconciliation of total segment assets to total assets
Assets	$ 262,493	$ 355,855