REAL ESTATE AND OTHER AFFILIATES (Narrative) (Details)					1 Months Ended	3 Months Ended				6 Months Ended
	Jun. 01, 2016 a	Mar. 16, 2016 ft²	Jan. 24, 2014 USD ($) a item	Oct. 04, 2013 USD ($) a	Jan. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($) item $ / a	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Real Estate and Other Affiliates
Book value of land contributed to joint venture						$ 315,617,000	$ 322,462,000			$ 315,617,000
Area of land sold | ft²		42,694
Land sales						61,098,000		$ 45,433,000		103,040,000	$ 93,514,000
Equity in earnings						20,275,000		$ 1,081,000		22,207,000	$ 2,869,000
The Summit
Real Estate and Other Affiliates
Book value of land contributed to joint venture									$ 13,400,000
SID Bonds transferred to a joint venture									1,300,000
Transaction value of the land contributed to joint venture									$ 125,400,000
Value of land contributed to joint venture (in dollars per acre) | $ / a									226,000
Preferred return, on capital (as a percent)									5.00%
Return on capital contributions (as a percent)									5.00%
Entitlement of distribution by joint venture (in times) | item									2
Land sales										122,300,000
Amount of lot closing completed						48,200,000
Equity in earnings						8,900,000
The Summit | Maximum
Real Estate and Other Affiliates
Maximum capital contribution required									$ 30,000,000
Grandview SHG, LLC
Real Estate and Other Affiliates
Investment in joint venture						8,200,000				8,200,000
Amount of bridge loan						25,000,000				25,000,000
Redevelopment loan						36,000,000				36,000,000
Additional capital contribution						2,300,000				$ 2,300,000
Grandview SHG, LLC | Bridge Loan [Member]
Real Estate and Other Affiliates
Interest rate margin (as a percent)										5.00%
Circle T Ranch
Real Estate and Other Affiliates
Area of land sold | a	74
Equity in earnings						10,500,000				$ 10,500,000
m.flats (formerly Parcel C)
Real Estate and Other Affiliates
Transaction value of the land contributed to joint venture				$ 23,400,000
Area of land contributed to the joint venture (in acres) | a				5
Fair value of the land contributed to joint venture				$ 4,000,000
Additional capitalized development costs incurred resulting from contribution of land				3,100,000
Transaction value, per constructed unit of land contributed to joint venture				53,500
Non-recourse construction loan					$ 88,000,000
Cash contributed by joint venture partner					16,100,000
Distribution of the cash contributed by joint venture partner					$ 7,300,000
Profit on partial sale of land						200,000
Net investment in joint venture						3,900,000				3,900,000
Total book value contribution				$ 7,100,000
Contribution made till date						2,400,000				2,400,000
m.flats (formerly Parcel C) | Construction Loan Payable
Real Estate and Other Affiliates
Option to extend, term					1 year
Constellation
Real Estate and Other Affiliates
Area of land contributed to the joint venture (in acres) | a			4.5
Fair value of the land contributed to joint venture			$ 3,200,000
Non-recourse construction loan			$ 15,800,000			$ 9,300,000				$ 9,300,000
Number of units in Class A apartment building to be constructed | item			124
Area Of Land In Downtown Summerlin | a			400
Percentage of ownership interest of partners in joint venture			50.00%
Future contribution required							$ 1,000,000
Percentage of proceeds in excess of an amount determined by applying a specified capitalization rate to NOI			100.00%
Percent Share of Proceeds Upon Sale Of Property			50
Capitalization rate (as a percent)			7.00%
One Month LIBOR | m.flats (formerly Parcel C) | Construction Loan Payable
Real Estate and Other Affiliates
Interest rate margin (as a percent)					2.40%