SEGMENTS (Details 5) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Reconciliation of total segment assets to total assets
Total segment assets	$ 3,151,168,000	$ 2,989,474,000
Total assets	3,604,596,000	3,503,042,000
Master Planned Communities
Reconciliation of total segment assets to total assets
Total segment assets	1,816,675,000	1,756,625,000
Operating Assets
Reconciliation of total segment assets to total assets
Total segment assets	1,069,209,000	944,562,000
Additional information
Increase (decrease) in assets	125,000,000
Strategic Developments
Reconciliation of total segment assets to total assets
Total segment assets	265,284,000	288,287,000
Additional information
Reclassification of assets	50,800,000
Corporate and other
Reconciliation of total segment assets to total assets
Total assets	453,428,000	513,568,000
Additional information
Increase (decrease) in assets	$ (60,100,000)