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Acquired Intangible Assets And Liabilities (Schedule of Estimated Annual Amortization of Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Acquired in-place lease value    
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2019 $ 28,176  
2020 98,331  
2021 77,848  
2022 58,210  
2023 47,109  
Thereafter 174,282  
Net 483,956 $ 774,368
Tenant relationships    
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2019 28,970  
2020 115,879  
2021 115,879  
2022 115,879  
2023 115,879  
Thereafter 970,211  
Net $ 1,462,697