MORTGAGES, NOTES AND LOANS PAYABLE, NET (Schedule of Debt by Property) (Details) - USD ($)				12 Months Ended
	Mar. 27, 2020	Mar. 05, 2020	Oct. 17, 2019	Dec. 31, 2020	Aug. 18, 2020	Jun. 30, 2020	Jun. 22, 2020	Mar. 04, 2020	Jan. 07, 2020	Dec. 31, 2019	Jun. 27, 2019	Feb. 28, 2019
Debt Instrument [Line Items]
Carrying Value				$ 4,320,166,000
Unamortized bond issuance costs				(4,355,000)						$ (5,249,000)
Unamortized deferred financing costs				(28,442,000)						(36,899,000)
Total mortgages, notes and loans payable				$ 4,287,369,000						4,096,470,000
One-month LIBOR
Debt Instrument [Line Items]
Interest rate margin (as a percent)				0.14%
Three-month LIBOR
Debt Instrument [Line Items]
Interest rate margin (as a percent)				0.24%
Prime rate
Debt Instrument [Line Items]
Interest rate margin (as a percent)				3.25%
Operating Assets
Debt Instrument [Line Items]
Carrying Value				$ 2,052,295,000						2,338,317,000
Master Planned Communities
Debt Instrument [Line Items]
Carrying Value				181,520,000						235,284,000
Seaport District
Debt Instrument [Line Items]
Carrying Value				100,000,000						350,000,000
Strategic Developments
Debt Instrument [Line Items]
Carrying Value				$ 236,351,000						215,017,000
Three Hughes Landing
Debt Instrument [Line Items]
Interest rate (as a percent)				4.33%
Aggregate principal amount of debt issued		$ 61,000,000.0						$ 61,200,000
Three Hughes Landing | One-month LIBOR
Debt Instrument [Line Items]
Interest rate margin (as a percent)		2.60%
Three Hughes Landing | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.33%
Carrying Value				$ 0						59,822,000
The Woodlands Towers at the Waterway
Debt Instrument [Line Items]
Interest rate (as a percent)				3.68%
The Woodlands Towers at the Waterway | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.68%
Carrying Value				$ 0						336,570,000
1201 Lake Robbins | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.49%
Carrying Value				$ 273,070,000						0
The Woodlands Warehouse | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.49%
Carrying Value				$ 7,230,000						7,230,000
Downtown Summerlin
Debt Instrument [Line Items]
Interest rate (as a percent)				3.88%
Aggregate principal amount of debt issued							$ 221,500,000
Downtown Summerlin | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.88%
Carrying Value				$ 0						259,179,000
Two Merriweather
Debt Instrument [Line Items]
Interest rate (as a percent)				4.23%
Two Merriweather | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.23%
Carrying Value				$ 0						28,216,000
Outlet Collection at Riverwalk | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.50%
Carrying Value				$ 28,679,000						30,615,000
100 Fellowship Drive
Debt Instrument [Line Items]
Interest rate (as a percent)				3.23%
100 Fellowship Drive | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.23%
Carrying Value				$ 0						47,916,000
20/25 Waterway Avenue | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.79%
Carrying Value				$ 12,855,000						13,131,000
Millennium Waterway Apartments | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.75%
Carrying Value				$ 51,946,000						53,032,000
HHC 242 Self-Storage
Debt Instrument [Line Items]
Interest rate (as a percent)				4.33%
HHC 242 Self-Storage | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.33%
Carrying Value				$ 0						5,499,000
HHC 2978 Self-Storage
Debt Instrument [Line Items]
Interest rate (as a percent)				4.33%
HHC 2978 Self-Storage | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.33%
Carrying Value				$ 0						5,395,000
Lake Woodlands Crossing Retail | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				1.94%
Carrying Value				$ 12,329,000						12,163,000
Lakeside Row | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.39%
Carrying Value				$ 31,566,000						23,958,000
Two Lakes Edge | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.40%
Carrying Value				$ 66,198,000						38,214,000
The Woodlands Resort & Conference Center
Debt Instrument [Line Items]
Carrying Value						$ 62,500,000
The Woodlands Resort & Conference Center | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.00%
Carrying Value										62,500,000		$ 62,500,000
Lakefront North
Debt Instrument [Line Items]
Interest rate (as a percent)				3.73%
Lakefront North | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.73%
Carrying Value				$ 0						32,731,000
9303 New Trails | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.88%
Carrying Value				$ 10,763,000						11,196,000
4 Waterway Square | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.88%
Carrying Value				$ 31,519,000						32,789,000
Creekside Park West | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.39%
Carrying Value				$ 14,719,000						8,505,000
The Lane at Waterway | Strategic Developments
Debt Instrument [Line Items]
Interest rate (as a percent)				1.89%
Carrying Value				$ 22,167,000						1,000
6100 Merriweather | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.89%
Carrying Value				$ 62,040,000						36,418,000
Juniper Apartments | Strategic Developments
Debt Instrument [Line Items]
Interest rate (as a percent)				2.89%
Carrying Value				$ 65,808,000						34,610,000
Tanager Apartments | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.50%
Carrying Value				$ 39,744,000						29,165,000
9950 Woodloch Forest Drive
Debt Instrument [Line Items]
Interest rate (as a percent)				2.09%
9950 Woodloch Forest Drive | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.09%
Carrying Value				$ 71,106,000						0
Two Summerlin
Debt Instrument [Line Items]
Interest rate (as a percent)				4.25%
Two Summerlin | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.25%
Carrying Value				$ 0						33,183,000
Ae‘o Retail
Debt Instrument [Line Items]
Interest rate (as a percent)				2.90%
Carrying Value				$ 30,500,000
Ae‘o Retail | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.90%
Carrying Value				$ 30,532,000						0
Ke Kilohana Retail
Debt Instrument [Line Items]
Interest rate (as a percent)				2.90%
Carrying Value				$ 9,300,000
Ke Kilohana Retail | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.90%
Carrying Value				$ 9,327,000						0
3831 Technology Forest Drive | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.50%
Carrying Value				$ 20,686,000						21,137,000
Kewalo Basin Harbor | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				2.89%
Carrying Value				$ 11,562,000						11,110,000
Millennium Six Pines Apartments | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.39%
Carrying Value				$ 42,500,000						42,500,000
3 Waterway Square | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.94%
Carrying Value				$ 46,224,000						47,647,000
One Lakes Edge | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.50%
Carrying Value				$ 69,440,000						69,440,000
Aristocrat | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.67%
Carrying Value				$ 37,093,000						38,055,000
Creekside Park Apartments | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.52%
Carrying Value				$ 37,730,000						37,730,000
One Hughes Landing | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.30%
Carrying Value				$ 50,815,000						52,000,000
Two Hughes Landing | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.20%
Carrying Value				$ 48,000,000						48,000,000
8770 New Trails | Strategic Developments
Debt Instrument [Line Items]
Interest rate (as a percent)				4.89%
Carrying Value				$ 35,417,000						15,124,000
Constellation Apartments | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.07%
Carrying Value				$ 24,200,000						24,200,000
Hughes Landing Retail | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				3.50%
Carrying Value				$ 34,328,000						35,000,000
Columbia Regional Building | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.48%
Carrying Value				$ 24,244,000						24,664,000
Las Vegas Ballpark | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.92%
Carrying Value				$ 48,173,000						51,231,000
250 Water Street | Seaport District
Debt Instrument [Line Items]
Interest rate (as a percent)				3.64%
Carrying Value				$ 100,000,000						100,000,000
Seaport District
Debt Instrument [Line Items]
Interest rate (as a percent)				6.10%
Seaport District | Seaport District
Debt Instrument [Line Items]
Interest rate (as a percent)				6.10%
Carrying Value				$ 0						250,000,000
‘A‘ali‘i | Strategic Developments
Debt Instrument [Line Items]
Interest rate (as a percent)				4.10%
Carrying Value				$ 154,601,000						30,717,000
Kō'ula | Strategic Developments
Debt Instrument [Line Items]
Interest rate (as a percent)				3.14%
Carrying Value				$ 65,282,000						0
110 North Wacker
Debt Instrument [Line Items]
Interest rate (as a percent)				4.73%
110 North Wacker | Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Deconsolidation of 110 North Wacker				$ 326,835,000
110 North Wacker | Strategic Developments
Debt Instrument [Line Items]
Interest rate (as a percent)				4.73%
Carrying Value				$ 0						184,300,000
Creekside Park The Grove | Strategic Developments
Debt Instrument [Line Items]
Interest rate (as a percent)				1.89%
Carrying Value				$ 16,468,000						0
Senior Secured Credit Facility | Operating Assets
Debt Instrument [Line Items]
Carrying Value				$ 615,000,000						615,000,000
The Bridgeland And Woodlands Credit Facility | Master Planned Communities
Debt Instrument [Line Items]
Interest rate (as a percent)				2.64%
The Woodlands Master Credit Facility
Debt Instrument [Line Items]
Interest rate (as a percent)				4.23%
The Woodlands Master Credit Facility | Master Planned Communities
Debt Instrument [Line Items]
Carrying Value				$ 75,000,000						107,500,000
Bridgeland Credit Facility
Debt Instrument [Line Items]
Interest rate (as a percent)				4.23%
Bridgeland Credit Facility | Master Planned Communities
Debt Instrument [Line Items]
Carrying Value				$ 75,000,000						107,500,000
Construction Loans | 8770 New Trails
Debt Instrument [Line Items]
Interest rate (as a percent)											4.89%
Aggregate principal amount of debt issued										35,500,000
Construction Loans | 8770 New Trails | One-month LIBOR
Debt Instrument [Line Items]
Interest rate margin (as a percent)				2.45%
Construction Loans | Kō'ula
Debt Instrument [Line Items]
Interest rate margin (as a percent)	3.00%
Aggregate principal amount of debt issued	$ 356,800,000
Construction Loans | Creekside Park The Grove
Debt Instrument [Line Items]
Aggregate principal amount of debt issued									$ 43,400,000
Special Improvement District bonds | Other SID Bonds | Operating Assets
Debt Instrument [Line Items]
Carrying Value				$ 2,785,000						3,441,000
Special Improvement District bonds | Summerlin South SID Bonds | Master Planned Communities
Debt Instrument [Line Items]
Carrying Value				$ 31,520,000						20,284,000
Special Improvement District bonds | Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)				5.00%
Special Improvement District bonds | Minimum | Other SID Bonds | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				6.00%
Special Improvement District bonds | Minimum | Summerlin South SID Bonds | Master Planned Communities
Debt Instrument [Line Items]
Interest rate (as a percent)				5.00%
Special Improvement District bonds | Maximum
Debt Instrument [Line Items]
Interest rate (as a percent)				6.00%
Special Improvement District bonds | Maximum | Other SID Bonds | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				6.05%
Special Improvement District bonds | Maximum | Summerlin South SID Bonds | Master Planned Communities
Debt Instrument [Line Items]
Interest rate (as a percent)				6.05%
Senior Notes | Senior Notes due 2025
Debt Instrument [Line Items]
Interest rate (as a percent)				5.38%
Carrying Value				$ 1,000,000,000						1,000,000,000
Aggregate principal amount of debt issued				$ 1,000,000,000
Senior Notes | Senior Notes due 2028
Debt Instrument [Line Items]
Interest rate (as a percent)				5.38%
Carrying Value				$ 750,000,000						$ 0
Aggregate principal amount of debt issued					$ 750,000,000
Term Loan | Senior Secured Credit Facility | Operating Assets
Debt Instrument [Line Items]
Interest rate (as a percent)				4.61%
Carrying Value				$ 615,000,000.0
Percent subject to interest rate collar contract				100.00%
Term Loan | The Bridgeland And Woodlands Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount of debt issued			$ 100,000,000.0
Line of Credit | The Bridgeland And Woodlands Credit Facility
Debt Instrument [Line Items]
Facility amount			$ 250,000,000.0	$ 250,000,000
Line of Credit | The Bridgeland And Woodlands Credit Facility | One-month LIBOR
Debt Instrument [Line Items]
Interest rate margin (as a percent)			2.50%