Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations (Narrative) (Details)

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Discontinued Operations (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
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sqft
property
Dec. 31, 2012
New Jersey [Member]
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Number of properties sold 24 3
Number of land parcels sold 3  
Area of property sold 3,006,409  
Sales proceeds $ 390,615