SEGMENTS (Summary of Assets by Segment and Reconciliation of Segment Assets to Total Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Reconciliation of total segment assets to total assets
Assets	$ 6,031,974	$ 5,721,582
Operating Assets
Additional information
Increase (decrease) in assets	73,900
Strategic Developments
Additional information
Increase (decrease) in assets	192,100
Operating Segments
Reconciliation of total segment assets to total assets
Assets	5,775,813	5,526,943
Operating Segments | Master Planned Communities
Reconciliation of total segment assets to total assets
Assets	2,005,373	2,022,524
Operating Segments | Operating Assets
Reconciliation of total segment assets to total assets
Assets	2,439,617	2,365,724
Operating Segments | Strategic Developments
Reconciliation of total segment assets to total assets
Assets	1,330,823	1,138,695
Corporate
Reconciliation of total segment assets to total assets
Assets	256,161	$ 194,639
Additional information
Increase (decrease) in assets	$ 61,500