Segments (Summary of Assets by Segment and Reconciliation of Segment Assets to Total Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Reconciliation of total segment assets to total assets
Assets	$ 9,508,080	$ 9,581,694
Operating segments
Reconciliation of total segment assets to total assets
Assets	9,126,530	8,904,499
Operating segments | Operating Assets
Reconciliation of total segment assets to total assets
Assets	3,278,586	3,607,718
Operating segments | MPC Segment
Reconciliation of total segment assets to total assets
Assets	3,190,230	3,056,240
Operating segments | Seaport Segment
Reconciliation of total segment assets to total assets
Assets	1,140,462	1,046,992
Operating segments | Strategic Developments Segment
Reconciliation of total segment assets to total assets
Assets	1,517,252	1,193,549
Corporate
Reconciliation of total segment assets to total assets
Assets	$ 381,550	$ 677,195