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Concentration Of Credit Risk (Details)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Concentration Risk [Line Items]      
Number of properties 65    
Geographic Concentration Risk [Member]
     
Concentration Risk [Line Items]      
Number of properties 28    
Revenues [Member] | Ahold N.V. [Member]
     
Concentration Risk [Line Items]      
Percentage of concentration risk 15.00% 14.00% 14.00%