INCOME TAXES (Summary of Tax Effects and Temporary Differences Included in Net Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Operating and Strategic Development properties, primary differences in basis of assets and liabilities	$ 92,210	$ 208,862
Interest deduction carryforwards	29,247	54,759
Operating loss and tax credit carryforwards	50,914	30,866
Total deferred tax assets	172,371	294,487
Valuation allowance	(17,271)	(18,635)
Total net deferred tax assets	155,100	275,852
Deferred tax liabilities:
Property Associated with Master Planned Communities, primarily differences in the tax basis of land assets and treatment of interest and other costs	(157,181)	(262,572)
Operating and Strategic Development properties, primarily differences in basis of assets and liabilities	(60,430)	(40,915)
Deferred income	(98,339)	(173,310)
Total deferred tax liabilities	(315,950)	(476,797)
Net deferred tax liabilities	$ (160,850)	$ (200,945)