SEGMENTS (Summary of Assets by Segment and Reconciliation of Segment Assets to Total Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of total segment assets to total assets
Assets	$ 8,413,766	$ 7,355,799
Operating Segments
Reconciliation of total segment assets to total assets
Assets	8,113,418	7,017,374
Operating Segments | Operating Assets revenues
Reconciliation of total segment assets to total assets
Assets	3,476,718	2,562,257
Operating Segments | Master Planned Communities revenues
Reconciliation of total segment assets to total assets
Assets	2,166,472	2,076,678
Operating Segments | Seaport revenues
Reconciliation of total segment assets to total assets
Assets	930,067	839,522
Operating Segments | Strategic Developments revenues
Reconciliation of total segment assets to total assets
Assets	1,540,161	1,538,917
Corporate
Reconciliation of total segment assets to total assets
Assets	$ 300,348	$ 338,425