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Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Summary of carrying amounts for real estate owned (at cost)
Land and Land Improvements	$ 1,945,846	$ 1,907,169
Depreciable property - held and used:
Building and improvements	5,502,984	5,384,971
Furniture, fixtures and equipment	280,470	272,640
Under development:
Under development	451,683	489,795
Real estate owned	8,182,116	8,055,828
Accumulated depreciation	(2,007,482)	(1,924,682)
Total real estate owned, net of accumulated depreciation	6,174,634	6,131,146
Land [Member]
Under development:
Under development	119,750	151,154
Construction in progress [Member]
Under development:
Under development	$ 333,066	$ 339,894

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The net book value of real estate held for investment and real estate under development.

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Real Estate Owned Gross.

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The current amount of expenditures for a real estate project that has not yet been completed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

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- Definition

Gross amount, at the balance sheet date, of long-lived, depreciable assets commonly used in offices and stores. Examples include desks, chairs, and store fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.

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Carrying amount of real estate held for productive use and alterations to land which improves its potential for use, examples include, but are not limited to, walkways, driveways, fences, and parking lots. Excludes land held for sale.

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The amount as of the balance sheet date of accumulated depreciation pertaining to real estate properties.

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