Tenant Leases (Future Minimum Rentals To Be Received Under Non-Cancelable Operating Leases) (Details) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2019 |
Dec. 31, 2018 |
|
| Property Subject to or Available for Operating Lease [Line Items] | ||
| 2019 | $ 314,708 | |
| 2019 | $ 143,385 | |
| 2020 | 274,893 | 306,559 |
| 2021 | 257,258 | 284,120 |
| 2022 | 239,094 | 258,076 |
| 2023 | 207,024 | 220,533 |
| 2024 and thereafter | 935,973 | 923,061 |
| Total | $ 2,057,627 | $ 2,307,057 |
| Tenant Leases [Member] | ||
| Property Subject to or Available for Operating Lease [Line Items] | ||
| Operating leases with various expiration dates through year | Dec. 31, 2036 | |
| Multi-Family Properties [Member] | ||
| Property Subject to or Available for Operating Lease [Line Items] | ||
| Lease period | 1 year |