Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2011
Commitments and Contingencies (Textuals) [Abstract]
Number of existing retail properties	11
Minimum amount of Compensatory and consequential damages	500
Charge as a result of termination without cause	$ 10.7
Stock based compensation expense relating to termination	1.5
Accrued termination expenses included in accounts payable and accrued expenses	$ 8.3

Describes the form and magnitude of the award the plaintiff seeks in the legal matter, which may include an unspecified amount of money.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12

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