Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
REVENUES
Disposal Group Including Discontinued Operation Rental Revenue	$ 2,931		$ 60,157
Disposal Group, Including Discontinued Operation, Revenue	2,931		60,157
EXPENSES
Disposal Group Including Discontinued Operation Property And Maintenance	422	[1]	26,019	[1]
Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance	250	[1]	4,362	[1]
Disposal Group Including Discontinued Operation Depreciation	371	[1]	10,908	[1]
Disposal Group Including Discontinued Operation General And Administrative	4	[1]	11	[1]
Disposal Group, Including Discontinued Operation, Operating Expense	1,047	[1]	41,300	[1]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	1,884		18,857
Disposal Group Including Discontinued Operation Interest And Other Income	25		5
Disposal Group Including Discontinued Operation Other Expenses	0		(4)
Interest (2)
Expense Incurred, Net	(7)	[2]	(522)	[2]
Disposal Group Including Discontinued Operation Amortization Of Deferred Financing Costs	0	[2]	(69)	[2]
Discontinued Operation, Tax Effect of Discontinued Operation	(80)		(42)
Income Loss From Discontinued Operations	1,822		18,225
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	132,956		123,754
Discontinued operations, net	134,778		141,979
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net					71,606
Disposal Group Including Discontinued Operation Mortgage Notes Payable					$ 0

[1] Includes expenses paid in the current period for properties sold or held for sale in prior periods related to the Company’s period of ownership.

[2] Includes only interest expense specific to secured mortgage notes payable for properties sold and/or held for sale.