SEGMENTS (Reconciliation of EBT to Income (Loss) Before Taxes) (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 16, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of REP EBT to GAAP net income (loss)
General and administrative		$ (89,882)	$ (86,588)	$ (81,345)
Warrant liability (loss) gain		(43,443)	(24,410)	58,320
Gain on acquisition of joint venture partner’s interest		23,332	27,088
Gain (loss) on disposal of operating assets		3,868	(1,117)	29,073
Corporate gains on sale of properties		125
Equity in earnings in Real Estate and Other Affiliates		(25,498)	(56,818)	(3,721)
Loss on redemption of senior notes due 2021	$ (46,400)	(46,410)
Corporate other (expense) income, net		54,615	116,268	1,829
Corporate depreciation and amortization		(132,252)	(95,864)	(98,997)
Operating Expenses		(936,233)	(824,511)	(680,153)
Income before taxes		120,822	320,776	150,720
Corporate
Reconciliation of REP EBT to GAAP net income (loss)
General and administrative		(89,882)	(86,588)	(81,345)
Corporate interest expense, net		(48,700)	(52,460)	(52,995)
Warrant liability (loss) gain		(43,443)	(24,410)	58,320
Gain on acquisition of joint venture partner’s interest		23,332	27,088
Gain (loss) on disposal of operating assets		3,868	(1,117)	29,073
Equity in earnings in Real Estate and Other Affiliates		(453)
Loss on redemption of senior notes due 2021		(46,410)
Corporate other (expense) income, net		(45)	6,241	1,409
Corporate depreciation and amortization		(8,298)	(6,496)	(6,042)
Operating Expenses		(209,906)	(137,742)	(51,580)
Operating Segments
Reconciliation of REP EBT to GAAP net income (loss)
REP EBT		330,728	458,518	202,300
Master Planned Communities | Operating Segments
Reconciliation of REP EBT to GAAP net income (loss)
REP EBT		190,351	179,481	114,366
Equity in earnings in Real Estate and Other Affiliates		(23,234)	(43,501)
Corporate other (expense) income, net		3,500
Corporate depreciation and amortization		(323)	(311)	(640)
Operating Assets | Operating Segments
Reconciliation of REP EBT to GAAP net income (loss)
REP EBT		(28,664)	(22,985)	(9,646)
Equity in earnings in Real Estate and Other Affiliates		(3,267)	(2,802)	(1,883)
Corporate other (expense) income, net		(315)	4,601	524
Corporate depreciation and amortization		(122,421)	(86,313)	(89,075)
Strategic Developments | Operating Segments
Reconciliation of REP EBT to GAAP net income (loss)
REP EBT		169,041	302,022	97,580
Equity in earnings in Real Estate and Other Affiliates		550	(10,515)	(1,838)
Corporate other (expense) income, net		108	611	(104)
Corporate depreciation and amortization		$ (1,210)	$ (2,744)	$ (3,240)