SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts and notes receivable
Balance of note receivable from GGP	$ 27,953,000	$ 35,354,000
Notes receivable from various tenants, net of an allowance for uncollectible notes receivable included in Notes receivable	800,000	800,000
Municipal Utility District receivables
Receivables net of allowances	5,300,000	5,800,000
Income Taxes
Number of Master Planned Communities	2
Threshold percentage of costs of contractual obligations incurred for recognition of gain for tax purposes	95.00%
Deferred Expenses
Deferred expenses, net of accumulated amortization	12,900,000	10,300,000
GGP
Allowance for doubtful accounts and notes receivable
Balance of note receivable from GGP	19,300,000	25,200,000
Note receivable from GGP, interest rate (as a percent)	4.41%
Cash payments under the note receivable	6,900,000
Allowance for Doubtful Accounts
Changes in allowance for doubtful accounts and notes receivable accounts
Balance at the beginning of the period	8,496,000	10,966,000	11,455,000
Provision (Recovery)	1,224,000	(235,000)	1,782,000
Write-offs	(806,000)	(2,235,000)	(2,271,000)
Balance at the end of the period	$ 8,914,000	$ 8,496,000	$ 10,966,000