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Represents the area of the land contributed to the joint venture by the entity.

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The area of land in downtown Summerlin.

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The number of units in a real estate property that have closed.

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Represents the number of units in a real estate property to be constructed.

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Represents the ownership ratio in a joint venture agreement.

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Represents the amount of capital contribution required in accordance with the loan agreement.

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Represents the partner's capital contribution to the equity method investee.

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Represents the percentage share of the proceeds from the sale of the property.

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Represents the percentage of equity interest held by partners in the joint venture.

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Represents the percentage of preferred return on the capital of the entity.

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Real Estate Affiliates increase of additional borrowings on existing and new debt instruments.

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Real Estate Affiliates carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Represents the reporting entity's proportionate share in indebtedness secured by the properties owned by real estate affiliates as on balance sheet date.

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Amount of SID bonds transferred to a Joint Venture.

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The per acre value of the land contributed to a joint venture.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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REAL ESTATE AND OTHER AFFILIATES (Details)								1 Months Ended	3 Months Ended			9 Months Ended
REAL ESTATE AND OTHER AFFILIATES (Details)	Jan. 24, 2014 USD ($) a item	Oct. 04, 2013 USD ($) ft² a item	Jul. 11, 2013 USD ($)	Aug. 06, 2012	Jul. 05, 2012 USD ($) a	May. 14, 2012 item	Oct. 27, 2011 item	May. 31, 2013 USD ($)	Sep. 30, 2015 USD ($) item	Mar. 31, 2015 USD ($) $ / a	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) item	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Investment in Real Estate and Other Affiliates
Carrying Value									$ 56,191,000			$ 56,191,000		$ 53,686,000
Share of Earnings/Dividends									295,000		$ 5,509,000	3,164,000	$ 18,164,000
Share of distributable cash												25,139,000	11,953,000
Aggregate carrying value of unconsolidated VIEs									20,300,000			$ 20,300,000		29,500,000
Number of variable interest entities in which entity is primary beneficiary \| item												1
Carrying values of the assets associated with the operations of the consolidated VIEs									21,400,000			$ 21,400,000		21,100,000
Carrying values of the liabilities associated with the operations of the consolidated VIEs									1,000,000			1,000,000		600,000
repayments of debt												40,066,000	45,443,000
Book value of land contributed to joint venture									305,634,000			305,634,000		317,211,000
Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Carrying Value									52,251,000			52,251,000		49,769,000
Share of Earnings/Dividends									295,000		5,641,000	1,417,000	16,515,000
Cost-method Investments [Member]
Investment in Real Estate and Other Affiliates
Carrying Value									3,940,000			3,940,000		$ 3,917,000
Share of Earnings/Dividends											(132,000)	1,747,000	1,649,000
Parcel C
Investment in Real Estate and Other Affiliates
Area of land contributed to the joint venture (in acres) \| a		5
Number of units in Class A apartment building to be constructed \| item		437
Area of real estate property to be constructed (in square feet) \| ft²		31,000
Fair value of the land contributed to joint venture		$ 4,000,000
Transaction value of the land contributed to joint venture		23,400,000
Transaction value, per constructed unit of land contributed to joint venture		$ 53,500,000,000
Discovery Land \| Equity Method Investments [Member]
Investment in 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%
Capital obligations									$ 0			$ 0
Entitlement of distribution by joint venture (in times) \| item												2
Discovery Land \| Equity Method Investments [Member] \| Maximum
Investment in Real Estate and Other Affiliates
Cash contributed by joint venture partner										$ 30,000,000
Millennium Woodlands Phase II LLC
Investment in Real Estate and Other Affiliates
Area of land contributed to the joint venture (in acres) \| a					4.8
Number of units in Class A apartment building to be constructed \| item						314
Fair value of the land contributed to joint venture					$ 15,500,000
Cash contributed by joint venture partner					3,000,000
Construction loan secured					$ 37,700,000
KR Holdings LLC \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Number of units in luxury condominium tower \| item									206			206
Number of units closed \| item												201
Parcel D
Investment in Real Estate and Other Affiliates
Fair value of the land contributed to joint venture			$ 20,300,000
Transaction value, per constructed unit of land contributed to joint venture			53,500
Cash contributed by joint venture partner			13,300,000
Percentage of ownership interest of partners in joint venture							50.00%
Additional improvements made in the venture			16,400,000
Future contribution required in accordance with the loan agreement			3,100,000
Distribution of the cash contributed by joint venture partner			7,000,000
Parcel D \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Number of units in Class A apartment building to be constructed \| item							380
Parcel D \| Construction Loan Payable
Investment in Real Estate and Other Affiliates
Aggregate principal amount of debt issued			$ 64,100,000
Outstanding debt									$ 57,900,000			$ 57,900,000
Interest rate margin (as a percent)			2.40%
Summerlin Apartments LLC
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)	50.00%
Area of land contributed to the joint venture (in acres) \| a	4.5
Number of units in Class A apartment building to be constructed \| item	124
Area Of Land In Downtown Summerlin \| a	400
Fair value of the land contributed to joint venture	$ 3,200,000
Percentage of ownership interest of partners in joint venture	50.00%
Percent Share of Proceeds Upon Sale Of Property	50
Percentage of proceeds in excess of an amount determined by applying a specified capitalization rate to NOI	100.00%
Capitalization rate (as a percent)	7.00%
Summerlin Las Vegas Baseball Club LLC
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)				50.00%
Amount funded in cash to joint venture								$ 10,500,000
Summerlin Las Vegas Baseball Club LLC \| Las Vegas 51S LLC [Member]
Investment in Real Estate and Other Affiliates
Ownership ratio in a joint venture (as a percent)				100.00%
Unconsolidated Properties
Investment in Real Estate and Other Affiliates
Secured debt									101,800,000			101,800,000
Share of the entity in secured debt									60,900,000			$ 60,900,000
One Month LIBOR
Investment in Real Estate and Other Affiliates
Variable rate basis												one month LIBOR
One Month LIBOR \| Parcel D \| Construction Loan Payable
Investment in Real Estate and Other Affiliates
Variable rate basis			one-month LIBOR
Master Planned Communities \| Discovery Land
Investment in Real Estate and Other Affiliates
Carrying Value									$ 12,052,000			$ 12,052,000
Operating Assets \| Millennium Woodlands Phase II LLC \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									81.43%			81.43%		81.43%
Carrying Value														$ 1,023,000
Share of Earnings/Dividends									$ (177,000)		(98,000)	$ (1,327,000)	(98,000)
Operating Assets \| Parcel D \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 4,617,000			$ 4,617,000		$ 4,800,000
Share of Earnings/Dividends									$ 140,000			$ (268,000)
Operating Assets \| Stewart Title \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 3,627,000			$ 3,627,000		$ 3,869,000
Share of Earnings/Dividends									$ 163,000		383,000	$ 659,000	901,000
Operating Assets \| Summerlin Las Vegas Baseball Club LLC \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 10,939,000			$ 10,939,000		$ 10,548,000
Share of Earnings/Dividends									$ 105,000		22,000	$ 389,000	199,000
Operating Assets \| Woodlands Sarofim 1 \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									20.00%			20.00%		20.00%
Carrying Value									$ 2,617,000			$ 2,617,000		$ 2,595,000
Share of Earnings/Dividends									$ 58,000		27,000	$ 133,000	123,000
Strategic Developments \| Circle T \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 9,004,000			$ 9,004,000		$ 9,004,000
Strategic Developments \| HHMK Development LLC \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 10,000			$ 10,000		$ 10,000
Share of Earnings/Dividends											386,000	$ 549,000	869,000
Strategic Developments \| Millennium Woodlands Phase II LLC \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									81.43%			81.43%		81.43%
Share of Earnings/Dividends											(145,000)		(280,000)
Strategic Developments \| KR Holdings LLC \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 694,000			$ 694,000		$ 9,183,000
Share of Earnings/Dividends									$ 6,000		$ 5,066,000	$ 1,282,000	$ 14,801,000
Strategic Developments \| Summerlin Apartments LLC \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 1,661,000			$ 1,661,000
Strategic Developments \| Parcel C \| Equity Method Investments [Member]
Investment in Real Estate and Other Affiliates
Economic interest (as a percent)									50.00%			50.00%		50.00%
Carrying Value									$ 7,030,000			$ 7,030,000		$ 8,737,000