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Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Summary of carrying amounts for real estate owned (at cost)
Land	$ 1,955,007	$ 1,847,127
Depreciable property - held and used:
Building, Improvements, and Furniture, Fixtures and Equipment	6,151,677	5,876,717
Under development:
Under development	321,094	466,002
Real estate owned	8,428,291	8,207,977
Accumulated depreciation	(2,379,033)	(2,208,794)
Real estate owned, net	6,049,258	5,999,183
Land [Member]
Depreciable property - held and used:
Real Estate Held-for-sale	0	10,751
Under development:
Under development	47,038	110,769
Building and Building Improvements [Member]
Depreciable property - held and used:
Real Estate Held-for-sale	0	5,969
Construction in progress [Member]
Under development:
Under development	$ 274,569	$ 356,644

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

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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

-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 S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 45

-Paragraph 4

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Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 970

-SubTopic 360

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-28.FN4)

-URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024



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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

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