Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) - USD ($) $ in Thousands |
Jun. 30, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Commitments And Contingencies [Abstract] | ||
| 2019 | $ 2,470 | |
| July 1 through December 31, 2019 | $ 875 | |
| 2020 | 1,750 | 2,491 |
| 2021 | 1,750 | 2,491 |
| 2022 | 1,750 | 2,491 |
| 2023 | 1,756 | 2,491 |
| 2024 through 2098 | 157,870 | 210,117 |
| Total | 165,751 | $ 222,551 |
| Less: imputed interest | (142,016) | |
| Total | $ 23,735 |