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Other Assets And Deferred Charges, Net (Schedule Of Future Charges Of Unamortized Balances Of Deferred Lease Origination Costs And Deferred Financing Costs) (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Deferred Costs And Other Assets [Line Items]    
Lease origination costs, 2018 $ 3,022,000  
Lease origination costs, 2019 2,555,000  
Lease origination costs, 2020 2,069,000  
Lease origination costs, 2021 1,683,000  
Lease origination costs, 2022 1,359,000  
Lease origination costs, thereafter 8,655,000  
Lease origination costs 19,343,000 $ 17,717,000
Financing costs 3,405,000  
Unsecured Revolving Credit Facility [Member]    
Deferred Costs And Other Assets [Line Items]    
Financing costs, 2018 602,000  
Financing costs, 2019 602,000  
Financing costs, 2020 602,000  
Financing costs, 2021 401,000  
Financing costs $ 2,207,000 $ 1,554,000