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Debt (Aggregate Annual Principal Payments For Mortgages And Notes Payable) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Debt Disclosure [Abstract]  
2020 $ 1,699
2021 325,756
2022 253,289
2023 77,990
2024 386,283
Thereafter 89,379
Net Unamortized Premium 821
Mortgages Payable $ 1,135,217