Equity, Capital and Other Interests Preferred (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	100,000,000us-gaap_PreferredStockSharesAuthorized	100,000,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 1,000,000 shares issued and outstanding as of December 31, 2014 and December 31, 2013	$ 50,000us-gaap_PreferredStockValueOutstanding	$ 50,000us-gaap_PreferredStockValueOutstanding
Change in market value of Redeemable Noncontrolling Interests	139,818	(79,667)	(38,734)
Series K Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock Preference Units Issued	1,000,000	1,000,000
Preferred Stock Preference Units Outstanding	1,000,000	1,000,000
Preferred Stock Preference Units Redemption Price Per Share Unit	$ 50.00	$ 50.00
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%
Preferred Stocks Preference Units Redemption Date	Dec. 10, 2026
Annual Dividend Per Preferred Share Preference Unit	$ 4.145
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 1,000,000 shares issued and outstanding as of December 31, 2014 and December 31, 2013	50,000	50,000
Operating Partnership [Member] \| Series K Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock Preference Units Issued	1,000,000	1,000,000
Preferred Stock Preference Units Outstanding	1,000,000	1,000,000
Preferred Stock Preference Units Redemption Price Per Share Unit	$ 50.00	$ 50.00
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%
Preferred Stocks Preference Units Redemption Date	Dec. 10, 2026
Annual Dividend Per Preferred Share Preference Unit	$ 4.145
Preferred Units Value Outstanding	$ 50,000	$ 50,000

Aggregate dividends payable during the year for each share/unit of preferred stock/preference units outstanding.

No definition available.

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- Definition

The percentage rate used to calculate dividend payments on preferred shares/preference units.

+ References

No definition available.

+ Details

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- Definition

Total number of preferred shares/preference units issued to security holders. May be all or portion of the number of preferred shares/preference units authorized. Excludes preferred shares/preference units that are classified as debt.

+ References

No definition available.

+ Details

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- Definition

Aggregate number of preferred shares/preference units held by security holders. Does not include preferred shares/preference units that have been repurchased.

+ References

No definition available.

+ Details

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- Definition

The price per share/unit at which the preferred share/preference units of the entity has priority over common shares/units in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of these preferred shares/units are solely within the control of the issuer.

+ References

No definition available.

+ Details

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- Definition

The date at which or after redeemable preferred stock/preference units may be redeemed for cash at the option of the company in whole or in part at a redemption price equal to the liquidation price per share/units plus accrued and unpaid distributions if any.

+ References

No definition available.

+ Details

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- Definition

Value of all preference units held by limited partners, which also represents their ownership interest.

+ References

No definition available.

+ Details

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- Details

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- Definition

Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

+ References

No definition available.

+ Details

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29

-Article 5

+ Details

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

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- Definition

Value of all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by shareholders, which is net of related treasury stock. May be all or a portion of the number of preferred shares authorized. These shares represent the ownership interest of the preferred shareholders.

+ References

+ Details

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