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Co-Venture Arrangement: (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2009 Freehold Raceway Mall and Chandler Fashion Center	Sep. 30, 2009 Freehold Raceway Mall sqft	Sep. 30, 2009 Chandler Fashion Center sqft
Co-Venture Arrangement:
Ownership interest				49.90%
Property square footage					1,674,000	1,321,000
Warrant in favor of the third party to purchase shares of common stock (in shares)				935,358,000
Exercise price of stock warrants (in dollars per share)				46.68
Cash proceeds for the overall transaction	$ 416,077	$ 136,707	$ 16,960	$ 174,650
Proceeds attributed to warrants				6,496
Co-venture obligation	$ 81,515	$ 92,215		$ 168,154

X

- Definition

The percentage of ownership interest in the joint venture sold by the entity during the period.

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Cash inflows from the sale of partnership interests, other assets, and discontinued operations.

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- Definition

Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5



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Area of a real estate property.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

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