Assets Held for Sale and Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Amounts classified as held for sale in consolidated balance sheets
Real estate, net	$ 10,390	$ 63,211
Other assets	361	2,421
Assets held for sale	10,751	65,632
Property debt	11,884	62,864
Other liabilities	155	753
Liabilities related to assets held for sale	$ 12,039	$ 63,617

For the disposal group, including a component of the entity (discontinued operation), carrying value (net of accumulated depreciation and any write-downs) of tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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Liability (such as a mortgage) related to a disposal group that is held for sale and anticipated to be sold in less than one year. The liability is expected to be discharged as part of the plan of sale for the asset.

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