Acquired Intangible Assets And Liabilities (Schedule Of Estimated Annual Amortization Of Leases) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Acquired Below-Market Lease Value [Member]
Finite-Lived Intangible Assets [Line Items]
2013	$ 11,540
2014	9,618
2015	8,620
2016	7,357
2017	5,915
Acquired In Place Lease Value [Member]
Finite-Lived Intangible Assets [Line Items]
2013	57,924
2014	53,138
2015	44,450
2016	41,686
2017	$ 28,029

Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

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Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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