SEGMENTS (Summary of Assets by Segment and Reconciliation of Segment Assets to Total Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Reconciliation of total segment assets to total assets
Assets	$ 6,723,696	$ 6,367,382
Operating Segments
Reconciliation of total segment assets to total assets
Assets	6,213,254	5,779,048
Operating Segments | Master Planned Communities
Reconciliation of total segment assets to total assets
Assets	2,054,621	1,982,639
Operating Segments | Operating Assets
Reconciliation of total segment assets to total assets
Assets	2,450,306	2,344,949
Operating Segments | Strategic Developments
Reconciliation of total segment assets to total assets
Assets	1,708,327	1,451,460
Corporate, Non-Segment
Reconciliation of total segment assets to total assets
Assets	$ 510,442	$ 588,334