OTHER ASSETS AND LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Prepaid Expenses and Other Assets
Special Improvement District Receivable	$ 41,256	$ 40,580
Other receivables	4,249	4,181
Federal income tax receivable	5,401	5,393
Prepaid expenses	4,051	6,507
Security and escrow deposits	9,888	17,266
Uncertain tax position asset	13,339	11,935
Intangibles	3,000	3,074
Other	5,206	4,661
Total prepaid expenses and other assets	119,987	127,156
Accounts Payable and Accrued Expenses
Construction payable	9,519	8,923
Accounts payable and accrued expenses	34,300	45,078
Membership deposits	18,279	16,033
Deferred gains/income	7,479	5,739
Accrued interest	2,247	2,747
Accrued real estate taxes	6,463	3,439
Tenant and other deposits	6,699	5,966
Insurance reserve	4,658	4,728
Accrued payroll and other employee liabilities	5,743	9,658
Interest rate swaps	6,697	4,367
Other	14,682	15,978
Total accounts payable and accrued expenses	119,435	125,404
Below-market ground leases
Prepaid Expenses and Other Assets
Net carrying amount	20,510	20,680
Above-market tenant leases
Prepaid Expenses and Other Assets
Net carrying amount	1,078	1,014
In-place leases
Prepaid Expenses and Other Assets
Net carrying amount	12,009	11,865
Above-market ground leases
Accounts Payable and Accrued Expenses
Net carrying amount	$ 2,669	$ 2,748