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Real Estate Owned (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Summary of carrying amounts for real estate owned (at cost)
Land	$ 1,919,597	$ 1,980,221
Depreciable property - held and used:
Building, Improvements, and Furniture, Fixtures and Equipment	6,413,037	6,225,406
Under development:
Real estate under development (net of accumulated depreciation of $0)	92,645	177,632
Real estate owned	8,425,279	8,383,259
Real Estates Owned Accumulated Depreciation	2,557,949	2,434,772
Real Estate Investments, Net	5,867,330	5,948,487
Land [Member]
Under development:
Real estate under development (net of accumulated depreciation of $0)	78,085	24,584
Construction in progress [Member]
Under development:
Real estate under development (net of accumulated depreciation of $0)	$ 14,560	$ 153,048

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Depreciable property - held and used.

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- Definition

Investment Building and Building Improvements, and Furniture, Fixtures and Equipment

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Real Estate Owned Gross.

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Real Estate Under Development.

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- Definition

Accumulated depreciation for real estate owned, including real estate held for investment, real estate under development, and real estate held for disposition.

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Summary Of Carrying Amounts For Real Estate Owned.

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- Definition

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



-Subparagraph (SX 210.7-03.10)



-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Amount before accumulated deprecation and depletion of real estate held for productive use and additions or improvements to real estate held for productive use, examples include, but are not limited to, walkways, driveways, fences, and parking lots. Excludes land held for sale.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section 45



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



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Amount of real estate investments, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; (7) other real estate investments; (8) real estate joint ventures; and (9) unconsolidated real estate and other joint ventures not separately presented.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 944



-SubTopic 210



-Section S99



-Paragraph 1



-Subparagraph (SX 210.7-03.1(d))



-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 1



-Subparagraph d



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