SEGMENTS (Details 5) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Reconciliation of total segment assets to total assets
Total segment assets	$ 2,954,916	$ 2,837,508
Total assets	3,524,070	3,395,149
Master Planned Communities
Reconciliation of total segment assets to total assets
Total segment assets	1,787,034	1,778,515
Operating Assets
Reconciliation of total segment assets to total assets
Total segment assets	950,665	869,186
Strategic Developments
Reconciliation of total segment assets to total assets
Total segment assets	217,217	189,807
Corporate and other
Reconciliation of total segment assets to total assets
Total assets	$ 569,154	$ 557,641