Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 23,926,000	[1]	$ 4,339,000	[1]	$ 397,000	[1]
Additions Charged Against Operations	8,692,000	[1],[2]	22,245,000	[1],[3]	5,107,000	[1]
Net Recoveries			2,658,000	[1]	1,165,000	[1]
Balance at End of Year	32,618,000	[1]	23,926,000	[1]	4,339,000	[1]
Increase in valuation allowances	6,500,000
Full reserve for net deferred tax asset	2,100,000
Monroe Property [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Allowance for loan and lease losses	12,000,000
Interest reserves	2,900,000
Denham Springs, LA [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Rent reserves	$ 3,700,000

[1] Includes allowance for doubtful accounts, straight-line rent reserves, allowance for loan losses, tax valuation allowances and other reserves.

[2] Includes $3.7 million and $2.9 million in rent and interest reserves, respectively, related to our Denham Springs and Monroe properties and $2.1 million to fully reserve for the net deferred tax asset of one of our taxable REIT subsidiaries.

[3] Includes $12 million loan loss reserve related to our Monroe property and a $6.5 million increase in valuation allowances to fully reserve for the net deferred tax asset of one of our taxable REIT subsidiaries.