REAL ESTATE AND OTHER AFFILIATES (Narrative) (Details)					1 Months Ended	3 Months Ended			12 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 ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) a	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Real Estate and Other Affiliates
Book value of land contributed to joint venture						$ 320,936,000	$ 322,462,000		$ 320,936,000	$ 322,462,000
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								$ 2,818,000
Percentage of ownership interest of partners in joint venture			50.00%
Area of land sold | ft²		42,694
Land sales									215,318,000	187,399,000	325,099,000
Equity in earnings						3,200,000			56,818,000	3,721,000	23,336,000
The Summit
Real Estate and Other Affiliates
Total assets						151,300,000			151,300,000
Total liabilities						116,500,000			116,500,000
Equity						34,800,000			34,800,000
Revenues									80,000,000
Gross margin									47,200,000
Net income									43,500,000
Land sales									226,400,000
Amount of lot closing completed									184,900,000
Equity in earnings									43,500,000
33 Peck Slip (Grandview SHG, LLC) [Member]
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
33 Peck Slip (Grandview SHG, LLC) [Member] | 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	72								72
Equity in earnings									$ 10,500,000
m.flats/TEN.M
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
Total book value contribution				$ 7,100,000
Contribution made till date						6,300,000			6,300,000
m.flats/TEN.M | Construction Loan Payable
Real Estate and Other Affiliates
Option to extend, term					1 year
Constellation
Real Estate and Other Affiliates
Non-recourse construction loan			$ 15,800,000			$ 13,500,000			$ 13,500,000
Number of units in Class A apartment building to be constructed | item			124
Area Of Land In Downtown Summerlin | a			400
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%
Percentage of project occupied						51.60%			51.60%
Percentage of project leased						66.10%			66.10%
Total liabilities						$ 116,500,000			$ 116,500,000
Net income									43,500,000
Equity Method Investments
Real Estate and Other Affiliates
Equity in earnings									56,818,000	$ 3,721,000	$ 23,336,000
Equity Method Investments | 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, price per acre								$ 226,000
Preferred return, on capital (as a percent)								5.00%
Contractual Obligation								$ 0
Equity in earnings									$ 43,501,000
Equity Method Investments | The Summit | Maximum
Real Estate and Other Affiliates
Maximum capital contribution required								$ 30,000,000
Equity Method Investments | Constellation
Real Estate and Other Affiliates
Future contribution required							$ 1,000,000
One Month LIBOR
Real Estate and Other Affiliates
Interest rate margin (as a percent)									0.72%
One Month LIBOR | m.flats/TEN.M | Construction Loan Payable
Real Estate and Other Affiliates
Interest rate margin (as a percent)					2.40%