OTHER ASSETS AND LIABILITIES (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Prepaid Expenses and Other Assets
Special Improvement District receivable	$ 39,667,000	$ 39,659,000
Equipment	22,301,000
Tenant and other receivables	4,959,000	2,346,000
Federal income tax receivable	5,913,000	5,367,000
Prepaid expenses	7,266,000	4,757,000
Condominium deposits		19,616,000
Security and escrow deposits	15,007,000	12,865,000
Uncertain tax position asset	14,756,000	12,801,000
Intangibles	3,714,000	3,714,000
Other	6,671,000	8,592,000
Total prepaid expenses and other assets	151,434,000	143,470,000
Increase in prepaid expenses and other assets	7,900,000
Decrease in condominium deposits	19,600,000
Increase in tenant and other receivables	2,600,000
Increase in equipment related to the airplane purchase	22,300,000
Accounts Payable and Accrued Expenses
Construction payables	63,694,000	17,501,000
Accounts payable and accrued expenses	53,402,000	39,634,000
Condominium deposits		19,616,000
Membership deposits	23,136,000	20,248,000
Deferred income	20,956,000	7,767,000
Accrued interest	6,123,000	2,425,000
Accrued real estate taxes	8,262,000	6,622,000
Tenant and other deposits	11,891,000	8,096,000
Insurance reserve	2,087,000	9,037,000
Accrued payroll and other employee liabilities	13,035,000	11,514,000
Special assessment	2,868,000	2,868,000
Interest rate swaps	4,696,000	7,183,000
Other	11,360,000	15,420,000
Total accounts payable and accrued expenses	223,980,000	170,521,000
Increase in accounts payable and accrued expenses	53,500,000
Increase in construction payables	46,200,000
Increase in deferred income	13,200,000
Increase in accounts payable and accrued expenses	13,800,000
Accrual for a lease terminations	8,600,000
Decrease in condominium deposits	19,600,000
Ward Centers
Prepaid Expenses and Other Assets
Increase in tenant and other receivables	2,000,000
Below-market ground leases
Prepaid Expenses and Other Assets
Net carrying amount	20,087,000	20,341,000
Above-market tenant leases
Prepaid Expenses and Other Assets
Net carrying amount	1,147,000	1,896,000
In-place value tenant leases
Prepaid Expenses and Other Assets
Net carrying amount	9,946,000	11,516,000
Above-market ground leases
Accounts Payable and Accrued Expenses
Net carrying amount	$ 2,470,000	$ 2,590,000