Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) $ in Thousands |
Sep. 30, 2018
USD ($)
|
|---|---|
| Commitments And Contingencies [Abstract] | |
| October 1 through December 31, 2018 | $ 615 |
| 2019 | 2,471 |
| 2020 | 2,491 |
| 2021 | 2,491 |
| 2022 | 2,491 |
| 2023 through 2084 | 212,609 |
| Total | $ 223,168 |