OTHER ASSETS AND LIABILITIES (Details)-K (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Prepaid Expenses and Other Assets
Special Improvement District receivable	$ 33,318,000	$ 39,688,000
Equipment, net of accumulated depreciation of $2.4 million and $0.7 million, respectively	20,284,000	21,978,000
Tenant incentives and other receivables	14,264,000	6,757,000
Federal income tax receivable	8,629,000	6,053,000
Prepaid expenses	9,196,000	4,744,000
Net carrying amount	19,663,000	20,002,000
Security and escrow deposits	9,829,000	28,082,000
Other	2,014,000	6,588,000
Total prepaid expenses and other assets	310,136,000	173,940,000
Accumulated depreciation on other equipment	2,400,000	700,000
Accounts Payable and Accrued Expenses
Total accounts payable and accrued expenses	466,017,000	283,991,000
Prepaid Expenses and Other Current Assets [Member]
Prepaid Expenses and Other Assets
Increase in prepaid expenses and other assets	136,200,000
Increase in acquired in-place leases	23,400,000
Increase in tenant and other receivables	7,500,000
Decrease in security and escrow deposits	(18,300,000)
Decrease in uncertain tax position	13,100,000
Increase in restricted condominium deposits	139,200,000
Accounts Payable and Accrued Liabilities [Member]
Accounts Payable and Accrued Expenses
Construction payables	170,935,000	106,741,000
Accounts payable and accrued expenses	34,154,000	44,798,000
Condominium deposits	82,150,000	12,405,000
Membership deposits	21,023,000	19,665,000
Accrued interest	14,791,000	17,463,000
Accrued real estate taxes	9,903,000	8,581,000
Tenant and other deposits	12,756,000	9,490,000
Accrued payroll and other employee liabilities	25,838,000	15,666,000
Interest rate swap	3,144,000	4,164,000
Special Assessment	2,326,000	2,603,000
Other	21,050,000	13,656,000
Total accounts payable and accrued expenses	466,017,000	283,991,000
Increase in accounts payable and accrued expenses	182,000,000
Increase in construction payable	64,200,000
Increase in accrued payroll	10,200,000
Ward Centers [Member]
Prepaid Expenses and Other Assets
Number of new market rate towers	2
Ward Centers [Member] | Prepaid Expenses and Other Current Assets [Member]
Prepaid Expenses and Other Assets
Increase in condominium deposits	69,700,000
Shops at Summerlin Centre [Member] | Accounts Payable and Accrued Liabilities [Member]
Accounts Payable and Accrued Expenses
Increase in deferred income	46,700,000
The Club at Carlton Woods [Member] | Accounts Payable and Accrued Liabilities [Member]
Accounts Payable and Accrued Expenses
Decrease in membership deposits	3,800,000
Ground Leases below Market [Member]
Prepaid Expenses and Other Assets
Net carrying amount	19,663,000	20,002,000
Condominium deposits	151,592,000	12,405,000
Tenant Leases above Market [Member]
Prepaid Expenses and Other Assets
Net carrying amount	4,656,000	1,095,000
Uncertain tax position asset	383,000	13,528,000
Leases, Acquired-in-Place [Member]
Prepaid Expenses and Other Assets
Net carrying amount	32,715,000	9,306,000
Intangibles	3,593,000	3,714,000
Ground Leases above Market [Member] | Accounts Payable and Accrued Liabilities [Member]
Accounts Payable and Accrued Expenses
Net carrying amount	2,272,000	2,431,000
Deferred income	$ 65,675,000	$ 26,328,000